Ah you new guys always lowball the price of guns so much lol
It's about 500$ for a good, but used, starter package.
Since your on a budget, Tokyo Marui is your best friend. They're plastic guns, but its good plastic and their internals are REALLY realiable!
Don't go and buy a chinese clone thinking it's all the same stuff, because everyone I know who bought a chinese gun has put atleast half the cost of the gun in upgrades and replacement parts just to get it working half the time and shooting half as well as a TM