along with the "item for sale" check box i suggested, how about a dropdown box that lists the varios conditions of each item.
right now i'm showing that my most valuable tf is MP03 starscream $202 MISB... he's not MISB he's sitting on the credenza behind my desk.
make the dropdown box have options like: misb, mib, loose, customized, trashed, whatever... like the various values you have listed for each item. i'd like a more real value on my collection. 95% of mine are loose. i have 1 misb and that's only because he's going to be kitbashed as soon as i have the stickers produced.