Originally Posted by Kuro_Neko
For $250, the best you could manage is Aftermath stuff. Both the Broxa (full stock MP5) and the Kraken (AK47) are decent bargain basement guns, about $160 or so each. Stay away from Aftermath's Kirenex or Knight (both M4 variants) and the Lycaon (collapsible stock MP5) though, not a good rep. The next better manufacturer would be JG and you won't get one of those cheaper then $300.
or a brand new full black JG MP5 in the classifieds