to the OP,
I, as well, am not a lawyer.
Here - I did find something that a lawyer probably would have charged you $1200.00 for. Here's the search results for the companies patents:
United States Patent: 6202051
(also - they have many patents - you'd have to look them all over)
And also - go to this page and type their
domain name in the
Search term field. (their site doesn't seem to allow linking to the results page). You'll see all the names and "slogans" they've TM'd.
Trademark Electronic Search System (TESS)
Taking a quick overview, and a quick look at your site - it doesn't seem to jive. (unless they've TM'd a new slogan "You Bid You Win", and it's not available on those databases as of yet.)
You can always ask them to provide you proof on what exactly are you infringing on? If they really do have something on you, they should want to show you - after all, this would really intimidate you to cave in.
It seems the fact may be (if the email you received is legit), they have interest in your domain - as it has similarity which may drive the odd more websurfer. (
opinion only)
Sell the domain to them - they're a public company and have tons of dough -- for you to make serious dough with it, will take a lot of time and money, why not cash out now, since you may have a serious buyer at your door. (worth a shot - you'd have to hold your guns)
IMPORTANT - get
real legal advice (from a specialist in this particular field). A lot of lawyers give a quick 10 minute free consultation - sometimes over the phone -- for a brief overview. BUT - get 2 or 3 -- because a lot of Vampires, I mean Lawyers, look to make money
for themselves if they feel there is a potential large party involved.
Good luck - Be careful.