The answer depends on what you are planning to do with it. If you just want a bike to ride in a park for leisure, surely you don’t need those mountain bikes with full suspension downhill machine, rebound control or articulated rear end etc. Therefore, it’s best for you to choose a more affordable model with basic features such as tread tires for off-road riding. These kinds of mountain bikes are probably readily available at your local bike shops or big sports stores at shopping malls. However, when it comes to pricing, in my opinion, in order to get the best deal possible, buying online is still the smartest choice.
However, if you are not a regular online shopper or you have just started cycling, you may need to dig up more information regarding different manufacturers and the MTB components. Just recently I found out the most comprehensive bike buying guides online from one of my favorite websites, no matter what you are looking for, from bicycle helmets to bike shorts, chances are they have already sourced the best information you need to know about them. So, before you rushing to make any purchasing decision, I strongly advise you to at least spend a couples of minutes reading their bike buying guide. Believe me, no matter you are a cycling veteran or just a newbie in the cycling field, their cycling buying guide has got a few tips that you would find useful. Enjoy your ride!