Recently bought this from a friend of mine for $100. This is my first mountain bike in probably 20 years other than my Bridgestone I got for Christmas as a kid. I don't trail ride but thought it would be great for around town because all I have are the old classics Schwinns that are not very practical. Was this worth $100 and are these good bikes? Thanks in advance. It is a 21 inch frame. I am 6 foot 7.