I've been a casual biker my whole life. Did some BMX Dirt Jumping in my teens and road my Huffy mtb around town. I mostly ride sidewalks and streets casually these days (26 now) on an old Bridgestone road bike with flat bars. I'm looking to add a mtb to the stable for some local dirt trails I recently found out about. I don't need anything really serious yet, just something that rides well and isn't 50lbs.
Looking at Craigslist, I see a Lot of used mountain bikes. What are some models I should be looking for? I probably can't spend more than ~$100-150 right now.
And I can tune and work on my own bikes no problem. Keeping that in mind, should I perhaps buy something older since it would be cheaper and I can fix it up a little if need be, or should I keep it to bikes made in the last few years?