I just bought a reconditioned LightSPEED 15XL from LightSPEED direct for $250. You can check their product availability here:

http://www.anrheadsets.com/productsrecon.asp

They show the 15XL as 'discontinued', but I would give them a call and see if they have any left in the pipeline. They're very helpful and friendly on the phone.

They do show a 20XLc for $350, but that might be more than you'd want to spend. I will say that, for a 'reconditioned' headset, it looks brand new.

-Kirk Wennerstrom
President, Cessna 150-152 Fly-In Foundation
1976 Cessna Cardinal RG N7556V
Hangar D1, Bridgeport, CT KBDR