Hey I just wanted to say that I love riding my ninja 250, but am thinking about upgrading to a bigger bike. I wanted to get some of your opinions on the bike i want. my friend is selling his 2005 ninja 636 and buying a four wheeler. the bike is red, has frame sliders, hotbodies exhaust, tinted screen, polished wheels, extended bar ends, and a little less than 3k miles. he likes to ride hard, but nothing to excess. the bike hasn't been stunted and he takes great care of it. anyways he is asking 6400 for it, blue book is 5675. average mileage for a 2005 is right around 14k. do you guys think i should buy it? i'm hoping to get around 4k for my 08 ninja. i have about 1000miles on it. i've added frame sliders, tinted the windscreen, and have a 5 year tire plan with it.