$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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Yamaha 920 / Yamaha Stagepas 100 BTRs / Senn e935 - LIVE
Roland RD 2000 / Tascam DP24sd / ATEM switcher - STUDIO