My first pair of headsets I bought long ago. Cheapest new ones money could buy. I forget the brand. They were highly optomized headache machines.
Then I bought a pair of Peltor's. Much nicer, lightweight, passive headset. I have flown with them for about 15 years.
Recently I've joined a club that owns a PA28R. It has a 4-place intercom. I'm interested to take my wife and two boys in the airplane, but need more headsets. Buying 3 quality, new headsets is a big chunk of change, either in dollars our pounds. So I went shopping on Ebay. Bought one old, used peltor and two more on the way from another auction. The first one I got was awesome. Just like my old peltors but a lot less worn. Quality headset, but cheap price. I bet the other two are fine too, find out this week. This is one way to buy headsets, so far it works for me.
-- IFMU