I don't know exactly what type of charger/batteries you are getting, but coming from the RC (car) world, the airsoft dealers are ripping you guys off. Example:
This Modify battery is $58.
http://www.airsoftgi.com/product_info.php?...roducts_id=9971
This SkyLipo battery is the exact same thing, except it has more capacity, and its 15 bucks!
http://www.hobbypartz.com/77p-sl1600-3s1p-30c-3333.html
Now, I know you guys are probably thinking, what in the world is SkyLipo? But, I assure you guys, they make quality batteries, that I have experience with. So, the only thing that would hold you or me back from getting this is, the size, and the connectors. So, I'm not sure what size the batteries they use in the Airsoft world, but if it's all the same size, then things just got a lot easier for you guys. And for the connectors, all you need to do is solder different connectors on or buy an adapter.