There is a bin in the hallway and everything in it still looks fine. Someone will tell you to sell it, and they are not wrong. People do sell kids' clothes, every day, and it works.
What nobody tells you is what a used kids' shirt is actually worth once the app has taken its cut. Not a fifty dollar jacket. A shirt.
What is left after the app takes its cut?
Almost every guide to reselling is written about a single good piece. A coat, a dress, something with a label worth photographing on its own. At that price the fees behave the way you would expect.
Kids' clothes do not sit at that price. A used 3T shirt is a ten dollar item, and ten dollars is where the fee structure changes shape.
Poshmark takes twenty percent on anything that sells for fifteen dollars or more. Under fifteen dollars it takes a flat two dollars and ninety-five cents instead. On a ten dollar shirt that is not twenty percent, it is closer to thirty. The cheaper the item, the bigger the bite.
Then there is shipping, which the buyer pays and which runs to around eight dollars. She is not deciding whether to spend ten dollars on your shirt. She is deciding whether to spend eighteen.
So the same fee structure that is mildly annoying on a jacket is punishing on the exact category children's clothing lives in.
The five ways people actually do this
There are five real routes, and every one of them works in the sense that clothes leave the house and something comes back.
- Consignment chains like Once Upon A Child pay cash on the spot. They sort the bin in front of you, keep the fraction they think will sell fast, and hand the rest back. Fastest route there is, and the lowest return.
- Send-in services like thredUP mail you a bag, do all the work, and pay you a share of whatever sells. No effort, long wait, and they decide what is worth listing.
- Peer-to-peer apps like Poshmark or Mercari pay the most per item and cost the most in effort. This is the route the arithmetic above applies to.
- Facebook Marketplace and local groups are free and fast for a whole bin at once, and people really do buy bundles by size. You are meeting a stranger in a parking lot.
- Buy Nothing groups and neighbourhood swaps are not selling at all. The clothes go to someone down the road, that day, for nothing.
Any of these beats a landfill, and I would rather you used one of them than throw good clothes away.
Which one is right depends on what is in the bin. A few genuinely nice pieces are worth listing individually. A bin of everyday shirts is not, and that is where most of us are.
The part that is not in the guides
Every guide costs this out in hours, and hours are not really what it costs. Photograph everything. Measure it. Write it up. Guess at a price. Post it. Answer "is this still available" from someone who then goes quiet. Relist the ones that did not move. Get an offer of two dollars for a coat.
None of those takes long. All of them sit in your head, and they keep sitting there until the bin is empty or you give up. I have sold on Poshmark and that was the part I did not expect — not the time, the low background hum of it.
That is the cost nobody prices, and you cannot price it until you have done it once.
So is it worth it?
For a few good pieces, yeah. Photograph them properly, list them individually, and you will do fine.
For the bin in the hallway, the arithmetic does not reward the evening. That is not an argument for throwing them away. It is an argument for picking the route that costs you the least, and being honest that the money was never going to be much.
The route I ended up building is swapping, where you send a bag of outgrown clothes and get credits for the next size instead of cash. You can see how that works at KidSwaps. It is not for everyone, and it is not selling — you get clothes back, never money.
