I get tons of different spoofs everyday. My "mail" forwards them automatically to my trash. But once in a while, a new one gets through.
I'm in the habbit now of checking the return address as you all mentioned above. There is definitely a lot of it going around.
I used to forward these to spoof@ebay.com, but with the high-volume of these I receive, not to mention that regardless of wether or not I forward it to spoof@, they still come.
Oh, well, part of eBay life.