I have both a ts4g and a rc3s. Great radios for the money and recievers are cheap. Lots of good reviews out there on them and I would say the best options especially if your budget ideally is under 50.
That being said I got a Airtronics MX-V recently and while I really like my rc3s and tS4g the ergonomics on the MX-V are better for me. A second hand Mx-v might be in your price range but they don't seem to go on sale as much.
But the rc3s/ts4g is still cheaper by a good amount and if you upgrade later it would be a great spare/loaner.