Bike Reviews

My sis got a autobike mountain bike but I saw no make or model on it. I like the idea of not having to shift gears so I looking for an affordable bicycle that either automatic or gear less and I want something rugged like a mountain bike. Dirt bikes are great but I feel like a little kid riding one. Any suggestions?

I’ve been looking at the specialized hardrock disc comp 2007. I Think I want that but before I make a purchase what else is there? Would you suggest a better bike for mountain biking? If so why?
Also I want a quality bike but of course cheapest price is always best. I dont want a cheap bike just a cheap deal on a good bike. Any ideas?