I absolutely adore ebay. I like to educate my friends and co-workers about how much cheaper they can find quality goods on ebay. I've found some wonderful bargains, from fur coats to guitars.
Sellers who won't accept Paypal! What a pain to buy a money order, address the envelope, and drive to the post office. Takes forever to get the merchandise. I try to avoid sellers who won't take Paypal. Another pet peeve: sellers who make their money by charging unreasonable amounts for shipping and handling, like $10 for a pair earrings!