Sorry, I don't have any helpful advice re: buying a C2. I've been using the erg for around 10 yrs now and for awhile had my own at home but after a few too many moves we had to part ways! I'm out on the west island myself and I workout at the local Y. I use a ModelC which has been retrofitted with the PM3 monitor and newer handle. (I also use a log card which I find convenient to keep track of my workouts).
Good luck with your search.
Go Habs Go
