I found a used V1 on Craig's list that is about 6 years old according to the seller and the serial number. The v1 website tells me that this unit has Version 1.7.
Assuming it still works as it should, is $100 a good deal for a unit that old?
It would cost $189 for an upgrade... which combined with my purchase would make it less than a new retail one, but I would prefer not to upgrade (which is why I'm shopping on craig's list!).