$200 for just a mic is reachable, but if you include the receiver and transmitter, a good one will cost about $500 or so. Might want to check with Frank.
I absolutely love my Shure PGX with WG30 wireless headset. It is extremely comfortable and sounds crystal clear.
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Live: Korg PA4X/Zed 6FX/EV Everse 8s/Senn 935/K&M stand
Studio: Korg PA4X/Yamaha DGX670/Yamaha PSR SX900/Boss BR900CD/Tascam DP24SD/MTM Iloud/Senn 935/K&M stand/Shure SM57/Sony C80 (2)/Blue Encore 300