What they're after is your info so they can send you a bogus check for your $1000.00 item with a check for $15,000.00 and you send them the difference for several reasons. They get your stuff, the check comes back no good, and you're out the $15k.
The amounts vary, and reasons to renig on the deal so they get all the cash.
Someone else will chime in on this, it's a hot subject. :evil: