Considering how much lipo's and the electronics in your RC are, $200 for a charger alone is within reason IMO. Myself I purchased a Revolectrix Powerlab 6 from Amain, very good charger. And if you're willing to spend that much on a charger, dont skimp on a power supply....buy something decent and that will meet your needs.

That being said, feathermerchantrc.com sells converted server PSU's for not a lot of money and many on this forum run them including me. For more money, you can buy a name brand from Amain and get an on/off switch and even a USB port for charging but in the end, I dont think there's a lot of difference.