I used to shop a lot on Ebay and have really slowed down over the past couple of years because I received too much "junk." In my experience, there are more bad sellers than there are good....
I did recently buy a few things and 3 of 4 auctions work out just as they should. The fourth auction was a "buy it now" thing, I paid immediately with Paypal and the seller sent a personal email explaining that she would ship the following Monday. Well - that never happened. I waited a couple of weeks and emailed her again. She responded with a long story about her dad passing away, etc., and said she would ship my pkg via Priority on Monday. I waited another week and still nothing so I filed a Paypal complaint. I looked her seller's history up (which, by the way she did have a couple of "slow ship" comments when I bought my item - but, she apparently came through because the buyers left positive feedback.), and I noticed that she had been listing & selling things all along during the time she said she couldn't contact me or ship my item. At just under 4 weeks of when I purchased the item, I left negative feedback and other buyers did as well. I did get all but a couple of $$ back from paypal - they were not able to recover 100% of the amount. I understand people have issues that pop up and are unable to complete transactions - but, if she would have been up front and refunded my money - I would have left positive feedback for her and moved on to find the item somewhere else.
Experiences like this have all but turned me off Ebay. I also don't like receiving something that isn't as decribed and getting stuck with junk. This has happened to me more times than not. Unless the seller is clearly a business - with at least a couple thousand positive feedback AND guarantees satisfaction of the item purchases - (similar to buying at a retail store on line) - I'll still buy from them on Ebay. Otherwise - NOOOOOOO WAYYYYYYY;o)