A salesmen at a local music shop offered me his nady VHF wireless system for AUS$100. He told me that because of HDTV I will get a couple of years out of it. I'm interested in wireless and prepared to spend this amount on this system as long as its of decent quality. I know it wont be great, but i'll be upgrading later down the track so I will just be using this to tide me over until then. Should I make the purchase?