Bicycling

they should be able to fit you at your local bike shop for far less than that amount of money. When I bought a "new" road bike from Craigslist, my local shop did a fit for $60 (which they usually do free when you buy from them). They check to make sure that the seat is correct (that would be a lot of the knee issue for you) for height as well as tilt and forward backward location. They also did handlebars height, angle, and distance forward. They checked my pedals and connection to shoes. Couple other things, too. That should meet your needs. I think what you posted is for high performance racers.