I am a bit new to this, but I have been looking at buying a used 1995 Trek 5200 with Shimano 600 components. It has new tires, a new seat, and new chain. I am not very familiar with this line of gears and shifters. Should I worry about 10 year old components or should they be ok to get me going? Will I be looking forward to replacing the group in the near future? Thanks for your help.