Whats all the Bluetooth about?

From UK, 1 post

I went to Carphone Ware house, and i wanted to buy a bluetooth headset, they started from £40 ($70) upto £120 ($200). whats that about???

Nokia, Motorola just ripping the hell out of us!

I found a similier bluetooth headset design and functions cheaper on ebay and other places

I think we should not buy there over charged mobile accessories and make the brand lower the prices!!!