How to estimate a batch of clothes before buying

A box in front of you, a price announced, and minutes to decide. This is the most ordinary situation in the trade, and it's also where you lose the most money, because you decide with your eyes rather than with maths.

The trap is always the same: you spot two or three nice brands on top, you project their price onto the whole batch, and you pay. Three months later, forty unsellable items are sitting in a corner and your money is locked in them.

Here's the method to price a batch before paying for it. It takes twenty minutes and it will save you from most bad deals.

Why eyeball estimation always gets it wrong the same way

Three biases work against you when buying, and they all push you to overpay.

The first is the top layer. Nobody puts damaged items on top of the box. What you see first is, by design, the best of the batch. If you estimate on that basis, you're estimating on the top ten percent.

The second is confusion between retail price and resale price. A brand that sells for one hundred twenty euros in a shop resells for what buyers actually pay for a comparable item in that condition at that time of year. These are two unrelated numbers.

The third is the cost of your time, which doesn't show up anywhere when you're paying. Every item in the batch has to be sorted, washed, photographed, described, listed, then shipped. A batch of one hundred items means dozens of hours of work whether it sells or not. We detail this calculation in calculating your secondhand margin.

The sample method

The principle is simple: instead of estimating the whole batch, you estimate a small part properly and extrapolate. It's faster and much more accurate.

Draw around twenty items at random. Not the ones on top. Plunge your hand into the middle and bottom, take what comes. If the vendor opposes you sorting through, you already have your answer about the batch.

For each item, note three things: the brand, the actual condition, and the price at which a comparable item actually sells. Check this last point in thirty seconds on your phone, by looking at recent actual sales not current postings. A forty euro listing that's been up for six months tells you nothing.

Then sort the twenty items into three piles. Items that will sell fast and well, items that will sell slowly or at low prices, and items you'll never put up for sale. That third pile teaches you the most.

The waste rate: the variable that decides

That third pile of your sample gives you the most important figure in the operation: the share of unsellable items.

This includes stains that won't come out, holes, irreparable pilling, deformed fabrics, tobacco or damp smells that linger, sizes too rare, and anything carrying a brand with no resale value. Add counterfeits, which won't sell and put you in difficulty if you list them without noticing. An undetected counterfeit won't sell and puts you in difficulty if you list it.

Order of magnitude to keep in mind, adjusted by your own experience: a sorted private batch often circles around 10 to 20 percent waste. An unsorted batch or one bought by weight often exceeds 40 percent. A clearance batch from a shop can go very low, but its purchase price reflects that.

This rate isn't guessed, it's counted. Four dead items out of twenty, that's twenty percent, and this number completely changes the price you can offer.

The calculation, in four lines

Take your figures and work through.

One. Median value of a sellable item, from your sample.

Two. Number of items in the batch, multiplied by the sellable share. One hundred items with twenty-five percent waste give seventy-five items actually usable.

Three. Multiply the two. You get the probable resale value of the batch. Seventy-five items at nine euros median makes six hundred seventy-five euros.

Four. Your maximum purchase price sits between one quarter and one third of this total. In our example, between one hundred seventy and two hundred twenty-five euros.

This ratio surprises people at first, and it seems harsh. It's not. The gap between one third and the total doesn't go in your pocket: it absorbs your processing time, the shipping costs you sometimes bear, price cuts you make to clear stock, items that never sell, and the months your money sleeps in a box. On this last point, our article on cash flow and slow-moving stock shows how quickly a poorly bought batch blocks an entire business.

The five questions to ask before pulling out your wallet

They take two minutes and reveal the essentials.

Where does the batch come from? Personal wardrobe, end of line, customer returns, consignment unsold, estate sale. Each source has its own quality and risk profile, and a vague answer is itself information.

How long has it been stored, and where? A box that's spent two years in a damp garage holds the smell, which doesn't always wash out. It's the most underestimated defect, because it doesn't show in a photo.

Has it already been sorted? If yes, by whom and on what basis. A batch where the nice items have already been removed rarely sells at the price of an intact batch.

Is the price firm? Asking costs nothing. On this ground, our guide on negotiating with a secondhand supplier gives the levers that actually work.

Will there be others? The answer changes your strategy. If the vendor has regular stock, paying a bit more for a first batch can be worth it to open the relationship. If it's a one-off, only the calculation counts.

The signs that tell you to pass

Some are outright refusals, others are clusters of red flags.

The vendor refuses to let you open the boxes or take items at random. There's no legitimate reason for this refusal.

He's pushing you. The good deal that disappears if you don't decide in five minutes is a tactic, not an opportunity.

The batch origin stays unclear after two questions. With sought-after brands, this also raises a provenance question you don't want to assume.

Your sample gives a floor price above what he's asking. There's nothing to negotiate: the maths has answered.

And the most discreet signal: a batch made up mostly of fast fashion with low unit value. Even without defects, one hundred items at four euros demand the same work as one hundred items at twenty, for a quarter of the result.

The special case of stock from a seller who's quitting

It's the most interesting batch on the market, and the rarest. The items are already sorted, often already washed, sometimes already photographed, and the seller knows the value of what she's handing over.

Two caveats. The asking price will be higher than a raw batch, which makes sense given the work already done. And stock from someone quitting often contains, by definition, what she couldn't sell: ask how long the items have been listed. The case is detailed in taking over stock from a quitting seller.

What to remember

Estimating a batch takes no rare experience or intuition: a sample of around twenty items picked at random, a median rather than an average, a waste rate counted not guessed, and a price ceiling at one third of the probable resale value.

The most profitable discipline in the trade is knowing when to walk away. A batch refused costs nothing. A batch bought badly locks up your money, your space and your energy for months, and it stops you above all from grabbing the good batch that will come next week.

Common questions

How do you estimate the value of a batch of clothes before buying?

Take a sample of around twenty items drawn at random from the batch, not the ones on top. For each, note the price at which a comparable item actually sells, not its original price. Calculate the median rather than the average, then subtract your estimated waste rate. You get a probable resale value per item, which you multiply by the total number of articles. Your maximum purchase price sits between one quarter and one third of this total.

What is the right price to buy a batch of clothes to resell?

The working rule is not to exceed one third of the probable resale value of the batch, waste deducted. Below one quarter, the deal is comfortable. Above one third, you're working for free the moment the batch takes longer than expected to sell through. This ratio isn't greed: it absorbs processing time, shipping costs you sometimes bear, unsold items and the months your money is tied up.

What is the waste rate in a batch?

It's the share of items you won't be able to sell: stains, holes, irreparable pilling, unfindable sizes, brands with no value, persistent odours. On a sorted private batch, expect often 10 to 20 percent. On an unsorted batch or one bought by weight, the share easily climbs to 40 percent or more. It's the variable that turns a good deal into a bad one, and it's the one pressed vendors forget to measure.

Should you buy a batch without seeing it?

Only with a vendor you know already and on an amount you can afford to lose. In a photo, you see the top layer, which is almost always the best. If you can't travel, ask for photos of items picked at random from the middle of the box, a photo of the composition labels and a written answer about the batch origin. A serious vendor responds; a vendor who evades already tells you what you wanted to know.

When should you pass on a batch?

When the vendor refuses to let you open the boxes or take items at random. When he's pushing the decision. When the batch origin stays unclear. Or when your sample gives a floor price above what he's asking. Passing costs nothing: the bad batch locks up your cash and storage for months. There will be other batches next week, it's the only certainty of the trade.