1) Buyer's side is concluded with timely payment.
2) Any seller who awaits my FB to post for me is not even going to have their item bid on.
3) Always look at seller's FB AND what they post for others.
4) Don't sell much on ebay but have in the past. If the buyer paid, I posted FB. I don't "over-grade" my stuff and try to take clear pictures/scans for them to judge for themselves.
5) For an interesting insight as to what some sellers think of buyers, go visit the feedback forum on ebay. It can be a real eye opener for those who mostly buy on the bay rather than sell.
6) If you are that concerned about a buyer and what sort of FB they will leave, check them out before the auction ends. Of course, this will avail you nothing if they snipe bid the item and win it.
Personal peeves:
Vague, out of focus pictures of an item that sort of resembles a knife. Shipping or handling charges out of line with value of item. Looked at a Blackjack knife today that parcel post is $9 and change and Priority Mail is $10 and change. For a knife that probably won't go for more than $100 or so, that is a hidden fee avoidance charge, not a handling charge. Bought a Microtech once for $8 shipping (little pricey but I knew that going in and wanted it that much). SOB shipped it in a thin, padded envelope via First class mail, rather than Priority Mail as indicated in his response to my question about shipping. It arrived in great shape but only by the grace of the USPS.
Poor packaging also gets me. Had a Case sent in a large Priority Mail box with absolutely nothing else in the box. Wrote the seller and told him I would have expected my 15 year old daughter to do a better job of packaging and he replied I was the first person to ever complain....
Finally, excess verbiage that sounds like a third year law student wrote it which is supposed to absolve the seller of any problem(s) with the item, shipping, etc. When it looks like a short story on the page, I hit the back button. A lot of times, if former buyers have had the guts to post negative feedback you see why there are 7 or 8 disclaimers about the item being sold. What a seller posts, especially as a negative can give you an idea of what "fun" it is going to be if the thing they send you has been misrepresented or arrives damaged.
YMMV
