I'm a road cyclist and looking to try out the trail. But, I want to buy a used bike and try to find something under $200. I just want to try it a few times. I started road cycling on a $60 80's something puegeot with a broken drive train and fell in love. So if mountain biking floats my boat as well, then a $200 bike should be good to try it out with.

Anyway, I'm going to search CL, thrift stores, and yard sales. It doesn't help I know nothing about mountain bikes, but I didn't know anything about road bikes either What should I be looking for in a used bike? Are there certain brands, models, components I should aim to get for that price range? Or does it not matter and anything that's at least not a walmart brand bike, will be ok? Is a walmart bike ok? Thanks for any advice!