exercise bikes?

i recently tore my ACL, and been sitting around since August long.. i've been going to physio for the past 6 weeks and stuff.. Will be going in for surgery probably in 3-4 weeks. I'm just wondering if anyone out there have an exercise bike at home? or have experience with some of em? I rode the ones they have at lindsay park and really liked em, but i bet they cost a fortune. i'm thinkin of gettin one for rehab.. nothing over 300 bucks though.. any ideas where I can look at these things?

Your best bet would be places like the bargain finder and find a good one used.

If you have a decent road bike, you can get a "treadmill" so it functions like a stationary bike. Not sure what they cost but probably less expensive than a good exercise bike.