And that's why letting people buy portions of a marketplace listing is a bad idea: with only 20 slots per retainers, sellers aren't going to want to use up a precious retainer slot to sell mats one at a time. So sellers will quit bothering to sell at all, and the marketplace will have fewer items at higher prices because of the reduced competition.
Buyers may want the marketplace to work more to their advantage, but that's a recipe for disaster.
Things are fine the way they are now, which is how they've been for years.
