I joined eBay three years ago and I buy from there ALL the time. I buy lots of new and second-hand CDs, DVDs and books at great prices. I keep meaning to sell some of my unwanted stuff but I never get around to it.....
I've been quite lucky with sellers - any time a CD or DVD has been faulty, they've always refunded or replaced, no problem. I've only had very, very few bad experiences and I was able to get my money back each time - from the insurance/claim, but not the seller.
I've no intention of buying any electrical items on eBay - if something went wrong, I'd have no way of returning the product for service, repairs or replacement and if there was a way, it would take a lot of effort and a lot of money - too much hassle. There are plenty electrical stores locally - the items are dearer, but the extra dollars are worth the convenience.