A lot of great responses in this thread. Changes my thinking a little. But in case some people mistook what I was trying to represent: I wasn't implying the seller should hold feedback hostage, I was tying to imply there are still possibly shady things that can be done by the buyer after payment. I thought once a seller leaves positive feedback you could not change it if the buyer were to be shady, but reading through these responses and looking into the itrader on here a bit further, it appears you can make a change if warranted. And that's what changes my thinking a little. Thanks guys and girls!
Looking for 2003 eTopps