This may seem a little fundamental,but, Can somebody or several people cover,how and what to look for when purchasing a used bike. I have bought two so far and Im learning as I go and its not always cheap. Im very mecanical and understand some of the obvious.I had purchased the first bike and it had a blown base gasket,I seen it when I looked but I did not fully understand how detrimental that could be.$7 later it was fixed with an OEM gasket (thanks to advice from here).These bikes are easy to work on and not always expensive to fix.But they will nickle and dime you to death,$30 here $75 there you get the idea.Im not refering to modding the bike out,just getting it were it needs to be,for basic riding.I hate to spend $800 on someone elses headache,I understand the used market,but armed with some knoweldge will help prevent the headaches,maybe.What and how do I check out the rear suspention? Bearings? Swing Arm? You get the idea.