I really like ebay although I now seem to buy more off Amazon especially new items. For used items its still ebay. I can't ever seem to remember to bid at the last minute so I usually bid ahead of time.

Like others wrote I also prefer to do Buy It Now even if it might be a bit more because I know I'm getting the item and don't have to wait a week or so to find out that I didn't win. Overall I have been very happy with the deals I have gotten and only a few less than honest sellers so no complaints.