Let me start off by saying I'm a long time lurker and seldom poster. That being said, I could really use some advice from the more upgrade savy riders here. A couple days ago I purchased a 2006 Avalanche Extreme on Craigslist for $200. I have been trailriding for several years and decided to purchase a new bike rather than upgrade my current hardtail that has a bunch of miles on it's second drivetrain and fork. The bike I purchased, and somewhat regret has a prestine frame that almost looks NOS or was possibly a warranty replacement. With the exception of an almost new XT rear der., everything else is tired. I made the mistake of buying it just as the sun was setting and didn't look it over too carefully (ouch.) My question is, should I replace components (cranks, brakes, fork, shifters...ect) or just send it back down the road for what I paid? Any advice would be appreciated.