I know absolutely nothing about mountain bikes. I'm a roadie/fixed gear person. However, I have a chance to pick up a 2000 Gary Fisher Big Sur this evening for a good price. What do I need to look out for? Would it be safe to assume the frame would still be OK after 7 years? Do the aluminum frames last? I haven't a clue how hard it's been ridden. I suspect the person that owned it rode it pretty good. It looks to be in very good shape though. Thanks in advance for input. As I said...I know nothing about this type of bike.