I'll echo Rootbeer's cautionary tale though I don't think that you necessarily need an AEG to be competitive. A long gun, sure, but Full Auto isn't a must and you might have just as good a time from a pump shotgun (
http://www.airsoftgi.com/product_info.php?cPath=139_181&products_id=3788 ). The learning curve for airsoft snipers is steep, to be sure, though as Root pointed out, if you have the personality for it, the avenue can be quite rewarding. Depending on your background a bolt gun could be a good option for you.
If cost is a prohibiting factor, there are several low-cost AEGs in that price range from JG and Echo1 which many players have found to be excellent starting guns
if cost is what is keeping you from getting into airsoft.
What I can say is that you are more than welcome to come out and experience Airsoft any Saturday we're holding an event. Get a chance to handle some gear and maybe even play a game or two so long as you have eye protection and appropriate clothing/footwear.
For what it's worth, I started playing this game with just a GBB Pistol before I realized the limitations of that weapon system and moved on to a more effective setup for myself. Let's face it, pistols have a rather significant limitation when considering effective range no matter how good they are.
Anyway, so what I'm trying to get at: If a bolt gun is what you want to start with, you should. We never know what style of play will mesh with our personality until we try it for a little while and adapt as you come to know yourself as an airsoft player. Several people will tell you that their current rigs aren't anything like what they thought they'd be playing with when they got into this sport/hobby and many of us are still learning what it is we like to play with.