Seeing you are in NJ, the SKS is a great option for you.
You can still buy them in the $300-400 range. 10rd internal box mag and no "Evil" features. I recommend a nice Chinese SKS if you can locate one. There are online dealers that sell them for $299 (Classic Firearms).
Ammo is relatively cheap at around $5/box of 20rds or $220/1k rds.