The trouble with halides is that a lot of people who would normally buy halides are buying LEDs instead. Personally, I would buy halides over LEDs any day. However, I'm in the minority. Someone who wants a top notch halide fixture will pay the money for it, but being able to find a buyer may be the challenge.
There is someone selling the 250 watt version in Quebec asking $750 which I think is quite a steal!
http://www.kijiji.ca/v-animaux-autre...lee/1023911251
How old is your fixture? I would be wanting more than $750 if the above one was my fixture, plus yours is the 400 watt version.