The kraken AK's can be pretty decent for $200
But if you plan on keeping it for a long while, and want a reliable, tough (internally) gun that is compatible with upgrade/replacement parts. Get age verified (need to be 18+), and look for a tokyo marui starter kit in the classifieds here.
TM's hold their value real well, they're guaranteed to be compatible with all internal upgrade parts, despite being plastic guns, it's tough plastic. You can usually find a set of everything you need (mags, gun, battery) for around $500 (which is less than the cost of a new gun). And if kept stock inside, they last forever.