Great topic.
I sold a fender acoustasonic amp on there that nobody wanted to buy locally. Who knew you could pack up an amp and ship it for like 30 bucks?
I bought an ibm laptop there used. It was a good buy, about 500 bucks.
Several things I have seen on ebay sell for 95% of buying it new. So I just buy it new. Everything you see on ebay, you should try to buy new first, IMHO. There seems to be no sense to the pricing sometimes.