Re: Oh how I hate evilbay
Some of the things I do when I sell-
1) Never use buy it now. It allows anyone to end the auction (as you saw), which means that many less people will see it. List the item for what you realistically want based on what they sell for. Or use a reserve price, and list it for less to entice bidding. Sometimes you'll get more at the end of an auction
2) Never end an auction early. People wait for the last second to bid
3) In the description, list all of your terms for sale, where you'll ship to, who you'll ship to, how you ship, so there are no misunderstandings...
4) Feel free to refuse any bidder with too many negatives or a zero feedback unless they specifically get email confirmation from you before bidding (one of the things you should list in your description)
A lot of it is trial and error too. You'll see what works for you as a seller...