The Twenty-Quid Jumper Problem: When Selling Old Clothes Costs More Than It Saves

Every November the same thing happens in my flat. The cold arrives, the big coat comes out, and the wardrobe door stops closing properly. What follows used to be a charity bag by the front door. Now it is a phone full of slightly gloomy photos, a pile of padded envelopes and a nagging sense that I have accidentally become a small logistics company.

Resale apps have done something clever. They have taken an ordinary chore — clearing out clothes — and dressed it up as a side hustle. Which would be lovely if the sums worked. Quite often, they do not.

The listing is the easy part

A photo, a title, a price, done. That is how it feels at the start. Then come the messages. Would you take three pounds instead of four? Is this still available? Can you post it tomorrow? Can you hold it until Friday?

Then the actual work: finding a mailer that fits, printing a label you do not own a printer for, walking to the parcel locker, realising the locker is full, walking to the other locker. Twenty minutes per sale is optimistic once you count everything. Forty is not unusual.

And the sale price for a mid-range high street jumper? Usually somewhere between three and eight pounds. A plain cotton tee, a supermarket cardigan, a pair of leggings that have been through the wash eighty times — these are not assets. They are textiles that happen to be indoors.

A worked example, because the numbers are sobering

Say you sell a jumper for seven pounds. The buyer pays postage on top, so that part is fine — except you have to buy the mailer (roughly 30 to 60p if you are not reusing one), and you have to get it to a drop-off point. Say that trip is fifteen minutes each way and you only do one parcel, because it is a Tuesday.

Add the time spent photographing, writing the listing, answering questions and packing. Call it forty-five minutes total. Seven pounds minus the mailer is about six-fifty. That is roughly eight pounds fifty an hour, before you account for the parcel that goes missing or the buyer who claims the jumper smells of perfume.

Now imagine the same jumper going into a charity shop bag on the way to the supermarket. It costs you nothing but the walk. The shop might sell it for a fiver, and if you are a Gift Aid donor, they claim a little extra on top. One of those routes is a business. The other is a donation. Only one of them is being honest about what it is.

The hidden costs nobody puts in the listing

Postage surprises. If you offer free postage to make your listing more attractive, that cost comes straight out of your margin. Undercharge on a heavy coat and you can lose money on a sale.

Returns and disputes. Buyer protection is good for buyers. It means a jumper can come back to you because the colour was not quite as expected, and you have now paid two sets of postage and spent two trips to the locker.

Packaging. Reusing your own mailers is genuinely the better move — but a plastic mailer has a life of about three trips before it splits, and new padded envelopes are not free.

The mental load of a half-finished job. A box of unsold clothes sitting in the hallway for four months is not zero waste. It is just waste with a to-do list attached.

What resale is genuinely brilliant for

Some things really do deserve a listing. Investment coats with a known label. Walking boots and waterproofs that still have years in them. Wool and cashmere knitwear in good nick. Occasion wear that has been worn exactly once. Kids' clothing in bundles of ten. Leather bags, quality denim, Dr Martens, anything with a recognisable name that people search for.

Resale also wins when the alternative is the bin. If something is functional but slightly imperfect, a cheap listing with an honest description — small mark on the cuff, zip sticks a bit — is far better than landfill.

What it is rubbish for

Fast fashion basics. Bobbled jumpers. Anything you would not pay four pounds for yourself in a charity shop. Socks with a hole. Pyjama bottoms that have gone see-through at the knee. And, crucially, anything that needs repairing before it can be worn — sell it only if you are upfront, and price it accordingly.

The decision tree I actually use now

1. Does it fit, and did you wear it this year? If yes, put it back and stop reading. The greenest garment is the one already in your wardrobe.
2. Could a repair make it wearable again? New buttons, a darned elbow, a replaced zip, a resoled boot. Often cheaper than replacing it, and most repair cafés will tell you honestly if it is not worth the effort.
3. Would you pay five pounds for it in a charity shop? If the answer is no, do not list it. Donate it, or put it in a textile bank.
4. Is it a brand or fabric people actively search for? Wool, linen, leather, down, heavy denim and a handful of labels hold value. Everything else does not.
5. Can you batch at least ten items in one session? One photo set-up, one pricing evening, one trip to the locker. Batching turns an unprofitable habit into a vaguely sensible one.
6. After packaging and time, does it clear two pounds an item? If not, the charity shop is the efficient choice.
7. Still unsure? Clothes swap, Freecycle, or a local community group. Someone will want it, and nobody has to print a label.

The unglamorous winner: wearing things out

There is a quiet, deeply unfashionable option that beats both listing and donating — actually finishing a garment. Wearing the same coat until the lining goes, then getting the lining replaced. Darning the heel of a sock. Keeping the boring black jeans as gardening jeans when they stop being going-out jeans.

Cost per wear is the only number that really matters. A cheap jumper worn two hundred times beats a nice one worn twice, every time.

A habit that sticks

Keep one box under the bed. Anything you decide to move on goes in it. Once a quarter, spend ninety minutes listing the decent things, bagging the rest for a charity shop, and taking one trip to the textile bank with anything unwearable. Whatever is still in the box six months later gets donated without further debate.

Selling your old clothes is not a bad thing. It is just a tool, and like any tool it has a job it is good at. Treating every worn jumper as a tiny business is not zero waste — it is a second job with worse pay.