Ask seller for serial # and ask the local PD if they can run them to see if it's been reported as stolen.

If seller is out of state, gun must be transferred to you through a FFL. You would send seller (of your local FFL dealer would send it) a copy of FFL license and $$$. Seller would then ship to your FFL. When it arrives at your FFL, he would then run NICS check and transfer gun to you (assuming you pass the NICS check).

If FTF with resident of Alabama, you do not have to transfer the gun into your name (just make sure you get a bill of sale from the seller).

http://www.aldeer.com/forum/ubbthreads.php?ubb=showflat&Number=56431#Post56431