Brett,
Actually a Flyer is only built to handle about a 15 lb. camera (+ accessories) or less. Though I'm not selling, I own one, and it's great for Prosumer cams. I've got mine set-up with an HVX200, rail system, M2 35mm adapter, Follow Focus, Matte box, & transmitter and I come in under 15 lbs.... a lot of stuff. Similar to the one here: http://www.steadi-onfilms.com.au/steadicam_flyer.html
If you're looking to buy used, there have been about 4 or 5 sold on ebay in the last 6 weeks or so. Depending on what battery system you're looking for, you might find a good deal there. If you're looking for something less expensive, I've got a Magiqcam 3p which is a lot like the Flyer (double-articulated arm, adjustable everything, low-mode), but it does not include monitor or battery. If you're interested, personal message me and I'll give you details & pics. I will be placing it on ebay next week.
Rod Weber
www.gracklefilm.com