you'll need in and around 500$ to get gun, extra mags, battery, simple gear and eye protection to start.. if you can't afford it, you can't afford it.. not to mention field fees and consumables like BBs. There's some reasonable AKs for under 300$ but there's not much selection in that price range, AK or very basic m4.
And this is airsoft.. shit breaks.. even the nice guns, so you'll need to set aside some money for when it breaks.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.