i got a nady that was $60 on ebay brand new and its great. up to 500 ft line of sight range
Pay at least $300 for a reliable one. Most of these $200 and less systems suck quite a lot of tone and are often unreliable live.

Some trusted brands: Shure, Audio-Technica, Samson
seriously? isnt that like the same kinda thing as talking on your cell? so pretty much i should be dying of cancer by now..
The Gearz:

Schecter Omen 6
B-52 At-100 head + 4x12 cab
Yamaha EG303
Digitech Bad Monkey Overdrive
^---- do what
Mesa Dual Rec/ Mesa 4X12 cab
01 PRS Custom 22
06 PRS Singlecut Ann.
1965 Fender Mustang
Ibanez acoustic
AceFrehley Epiphone LP
Takamine Explorer
tr-2 tu-2 / EHX DMM / MXR Script Phase 90 / SMM w/ HAZR
WH-1 Whammy / 535Q Crybaby