Question about Unlocked 9900

I found an unlocked TMobile 9900 on eBay that indicates that it will work on all GSM bands, I'm on A&T, so that would need 850/1900. It has all of that posted on the page.

Is this legit? Will the 3G data work and not just EDGE?

Here's the link:
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

If it's a TMO device, you will only get EDGE on AT&T.

Phil_UK is correct.. You will only get 2G on it.. You'll get 3G overseas.