sell premium items for donuts

i like the idea of selling premiums for doughnuts, even if you only get 50% back. the problem is again, i sied it with the nuke..... is the flag some of you are asking for, i buy frinks lab at a good price, i sell it to "farm" extra doughnuts, i cant buy it back because it is flagged, now if someone gets wrong town glitch, and they sell everything all those items would be lost forever because couldn't bypass the "already bought flag" sounds good but isent good.