Personally, I don't like all the 'noise'. Some of what I look for are:
- Good pic(s) - this is probably the #1 item.
- Decent description - doesn't mean wordy, just applicable. If you point out flaws that aren't obvious from pics (like interior of a mag), I'm more likely to trust you with your item.
- Feedback - not end all, be all, but I check what the negative/neutrals might say
- Price, including shipping -duh?
- Spelling and that the person can communicate - again, not end all, be all, but if the person takes time for coming across effectively, then I feel they 'care' for their items(s)
Much of the above just show you care (IMO).