That price is for just the vest. Alba Medical is the maker of the monitors that the Mt Hood Doberman Pinscher Club has--we loan them for a minimal price to members of the club. We started out with the analog model several years ago and now have two digital monitors (and maybe the old analog one too).
Alba still sells the analog (which are all reconditioned units) for $500. A reconditioned digital is on sale for $750 right now and a new digital is on sale for $1400.
Those price are for the kit and includes the wires, cards etc. The vest is not included--I think the vest that Mt Hood is now using is the Alba vest. It's made from wet suit type material--since it's stretchy it fits really well--there are other vests on the market from as low as $75 to as much $200--some are good some not so good.