update, 09/13/2018: I am not telling anyone to deliberately disobey someones "rules" because they legally can. I am simply saying your rules are not backed anything, you can not legally revoke a design that was bought, and you do not have a say in how much they resell it for. To be honest, I'd suggest not buying from someone asking you not to resell your own character. Avoid the trouble. They're bigots. Annoying and selfish, and are upset you are making a profit they didn't?
update, 10/14/2017: I am still a little disturbed that there are many a people thinking it is rude or disrespectful
to realize a profit down the road, or sell a charact