http://www.trapshooters.com/cfpages/threads.cfm
There is a link here about 30 threads down, on a Norinco stamped receiver AK with really nice furniture for $675.00. It hasn't sold in several days. If the one he is offering you is a milled receiver model it will be worth a little more than that. I would say it all hinges on how bad you want the weapon, in relationship to how bad he wants the car.