As subject says, want either a DS50 or 51 with appropriate EV controller, will also take arm (basic or 'deluxe', don't care) for planned use with a Canon A520 in the Canon housing. I'll get my own tray/handle to mount the arm to if you don't have one to go with the rest.
I am a bit cheap though - looking to spend up to $300ish (clarification - by "ish" I mean "in the 300's) + shipping (to Texas), but can be talked around some if the equip is on the newer/less used side, if the arm is nicer than the basic, and/or if the tray is included. (List price per B&H is $425 for strobehead, basic arm, and controller; no tray). Basically consider 70% of equivalent etailer's new list my 'starting bid' for well used but fully functional swag (cosmetics don't matter) and try to wiggle me up from there.
Will also be eyeing ebay (just missed one today by ONE DOLLAR, went for $276 and my max bid was $275! Argh, last minute sneaky bidders!) and also posting a WTB on Scubaboard. Will try to close out topic if I get one elsewhere.