The headphones were reviewed here by me. They are great, but I want to try to build a custom pair myself and I have the Logitech G35 headset now. $150 seems fair to me.
[EDIT - SOLD]
I have a Conn 8D nickel plated double horn that I bought new in 2003. I don't play anymore and would like to sell it. I know a few of you here play so I'll try here first. It's in really great condition but has a very small dent on the underside of the horn near the first finger valve. It doesn't affect the sound so it shouldn't be a worry. $2500 and it's yours.
I also have a Jupiter silver plated pocket trumpet with amado water keys. I bought it in 2001. It was dropped once so the slides require a little muscle, but otherwise you can't tell that anything ever happened to it. They are $600 new, so $400 obo.
[EDIT - SOLD]
This is current version of the Aerobed that my wife and I have been using for a year. It's a great bed and holds air with no leaks. I don't think we have refilled it for 4 months, which is as long as we have lived here. We just got a new mattress and frame, so we don't need it anymore. The differences between the one linked to and ours is a slight variation in the pump and the "big whoosh" air release is located at the foot of the bed instead of the head (good for a morning prank). I'm not really sure what I should ask for this. We bought it for $250 at target a year ago, but have used it almost every day since then. I think $170 is fair starting price, but if you are interested don't hesitate to make an offer.