Anyone like using a Wii?

My Dad used to be a big tennis player back in the day, and also really liked to do group exercise classes. Is this something he could do from a chair using Wii? My Dad is a para.

I just looked online and it costs $700 on Amazon (?!?!). That seems way to high.... Maybe it is being discontinued?

Is this something I should try to pick up used on Craigslist, or buy a refurbished model somewhere online? Which one?