Hi, everyone. I am completely new to cycling and it seems like everyone is almost speaking a new language. I recently developed tendonitis in my foot from overuse (marathon training), and need to mix up my exercise. Cue the bike and possible triathalon training.

I went in to my local bike shop to get some info about used/new bikes, etc. They had a used Cannondale R300 in great condition, frame size 52cm (I'm 5'7) for $300.

Because I'm new and I'm just testing things out, I don't want to commit to anything more than this. Is this a good deal?

Thanks for any help!