I can recommend many AEG's over 300.
Save up, its not going to kill you to wait an extra paycheque or two.
Keep in mind, the more you cheap out on an airsoft gun, you exchange 'convenience of cost' for quality.
With airsoft guns, it can be a very, very stark difference. Be careful and mind what you buy, don't buy something because it happens to be within a low budget and deems itself to be some '400 fps metal gears gun'. People spend the extra dollar for quality for a reason.