Here's a list of guns that I could think of that are in your range.
AEG's:
- JG MP5 series, including the MP5-A4 and the MP5-A5 (also called the MP5-J). Finding it in a right store, they range from $80-$110. Good CQB weapon, may be useful in mid ranges.
- WELL MP7, varies from $90-100 from different stores. Like the MP5, a little stronger, but hi-cap magazines may be rare. Since it's a WELL branded weapon, it may not last long because of the company's infamous weapon breakage rate.
- Galaxy MP5k, MP5k PDW, and the MP5 CQB (with M4 stock and railings), vary from $85-$100. Like the JG MP5's.
- CYMA CM028 and CM028S, which is the AK47 Assault Rifle and the AK47 folding stock, respectively. Very good weapons, though they have a lot of plastic exterior, the interior is built from tough metal so it'll last you for a while. Can cost around $95-$100.
Since your a beginner in airsoft, I'm not putting a list of sniper rifles and shotguns, because they're pretty bad weapons unless you got the patience and lack automatic fire, which makes airsoft a lot easier for starters.
P.S. if you can get more money (say around $15-30) I'd point you to some decent assault carbines, including the JG M4A1 and the JG G36C, which have more accuracy and more range than the SMG's (can match the CM028's).