In the $50 range, I think your best bet is a used Hitec Laser 4 from ebay or the sales forums here. I got my used Laser 4 from ebay for $35 + shipping, which should put you right in the ballpark.

I think you may be able to get a basic GWS radio for that money at www.allerc.com. Have a look.

Personally, I'd rather have a used-but-not-abused radio of a solid make than a new one that may or may not be cheezy.

Now if you have the money to buy a decent transmitter and are trying to save $$, the transmitter is not the place to do it. After all, you don't crash transmitters. They'll be around for a while if you take care of them.

A Hitec Optic 6 is a great all around transmitter. It has enough channels and programming options to fly planes, sailplanes, 3D, and helis. I just love mine.