I feel your pain, Bugeater. I consider myself one of the "good" sellers on there and I'm as descriptive as possible. Yet, there's always some jackass that can't read my damn ad and asks me a million questions that were answered in the ad.
Pictures are extremely important. I have an ad on there right now with 3 pics, (different angles), and someone actually emailed me asking me to take more pics and email them to them. I kindly replied back to them and stated that I uploaded 3 pics to the ad and that they clearly showed the quality of the item. They didn't respond back. lol
The idiots that leave their ads up after the item has sold irritate the crap out of me, too. I also get a kick out of seeing someone note in the description, "Sold". Hey dumbass, just delete your damn ad.
Maybe it's just Omaha, but there seems to be a lot of people out there that lack common knowledge.