Almost no seller fee stops growing on an expensive sale

A cap is a fixed fee turned upside down

On a cheap sale, a fixed charge makes the real rate higher than the headline. A cap does the opposite. Once a fee stops growing, every extra dollar of sale price carries less of it, so the share you pay keeps falling the more you charge.

That would matter a great deal to anyone selling a guitar, a watch or a rare pressing, if caps were common. They are not. Of the 29 platforms on this site, on their default settings, three take a meaningfully smaller share of a $20,000 sale than of a $100 one. Every other rate stays within a few tenths of a point of where it started, or goes up.

The three platforms whose rate falls

Same item, no shipping, default settings. “Fee stops growing from” is the price at which the marketplace’s own fee hits its cap or drops into a lower band, found by walking the engine one dollar at a time.

Discogs falls furthest: 13% of a $100 sale, 4.2% of a $20,000 one. Its cap is also the earliest to bite, at $1,667, so of the three it is the one where the effect shows up at prices ordinary sellers actually list at.

What the cap leaves behind

The caps above are on the marketplace’s fee. Payment processing is a separate line on two of these platforms, and it is not capped at all. So past a certain price the part of the bill that keeps growing overtakes the part that stopped, and the cap stops being the main story.

On Discogs, processing costs more than the capped fee from $4,285; at $20,000 it is $698.49 against $150.00. On Reverb, processing costs more than the capped fee from $15,659; at $20,000 it is $638.49 against $500.00. eBay folds processing into its own fee, so the lower band applies to the whole bill and there is no uncapped line left to overtake it.

Everyone else charges the same share, or more

The other 26 platforms, on default settings. Most move by a fraction of a point between the two prices — that is a small fixed fee fading out, not a cap.

Grailed goes the other way: 10% at $100, 12.5% at $20,000. That is a reduced rate for cheaper items rather than a cap — the Grailed calculator shows where the line sits.

Caps that depend on a setting

Switching one option at a time away from the defaults turns up 9 more cases on three platforms — Stripe, Amazon, Whatnot — where the share falls by at least a quarter. These are real, but they apply only to a particular category, payment method or promotion, so they are not the rate most sellers on those platforms pay.

What this does not say

It does not say where to sell an expensive item. A capped fee is one line of the cost; the audience a platform reaches, how it handles authentication and disputes, and what a buyer is willing to pay there all matter more on a large sale than on a small one. This page prices the fee and leaves the rest alone.

What it does say is checkable: on default settings, three of 29 platforms charge a falling share as the price rises, and on two of those the cap covers only part of the bill.

Check your own numbers

Every figure above comes from the same engine as the calculators. Put your own price into Discogs, Reverb or eBay to see the cap applied line by line, or open the comparison table to see every platform at once.

The other end of the range is in fees on cheap items, and whether one platform ever becomes cheaper than another as the price rises is in the fee crossover myth.