I got one for you about EMS...
Last year, I bid on an XP 1700+ chip they had for sale on ebay.
I won it at a price of $25, sent money (via Paypal) the next day, then 15 days later received an email from them saying something along the lines of
"Dear ebay bidder,
We appologize for the misunderstanding, but the processor that you bid on was not actualy up for sale. This auction was there to provide a link to purchase items from our website.
Thank you for your interest in EMS computers."
I went to my bank, & protested the payment. My bank refunded the money back into my account on the spot, and proceeded with legal action against EMS computers. I have since changed banks (moved out of the area) so I never heard more about what happened. I may just make a couple calls to them and see if I can find out what happened.