Russian made Saiga rifles. IMHO, these are the highest quality AK's made.
Based on the AK-47 design, produced on the same Russian assembly line.
These are popular military calibers -- that means cheaper ammo.
These do not have the pistol grip, but you can do a conversion and put one
on for $100 or so.
Link: http://centerfiresystems.com/SAI-762.aspx
Saiga 12 shotguns are $499.
Link: http://centerfiresystems.com/SAI-12.aspx