Does the unlocked HTC touch pro from amazon.com works in usa on any sim card ?

Why would you buy the International Version without US warranty ? The 3G won't work with AT&T and it's price is pretty high coz it shouldn't be more than $450. You can try eBay. If you need HTC Touch Pro 2 cheaper with US warranty and that should work fine with AT&T, you can mail me to manchurianp@yahoo.com