A 2005 People for a few hundered dollars is a great deal first of all. As for the mileage, it really doesn't matter how many miles are on the bike as long as it has been taken care of. I have a 99 People 50 with 12,000 miles and a ZX50 with 11,000 and they both run fine. The only vehicle I had to do work on was the 99 People 50 because it was stored on a beach for over two years, there was sand inside the motor so I had to tear it apart and clean everything and replace the crankshaft bearings. Even after that the vehicle started right up. If I were you I would not be concerned with mileage. If the plug is getting fouled up, take a look at the following: Take the spark plug out of the cylinder head and crank it over without the plug installed and see if there is a gas cloud escaping whilie it's cranking. You should'nt be able to see any. My advice would be to completly clean the carburetor, install a fuel filter, new spark plug, new air filter and replace the fuel lines. I bet you after all of that has been done, the vehicle will start. I'm not sure if a 125-200cc motor will fit on the bike. With the 50cc motor, you will be able to hit 50mph when it is derestricted. As for winter storage, take the spark plug out and put a small amount of two stroke oil into the cylinder and crank it over a few times. I wouldn't reccomend draining the fuel tank, I would fill it up completly and add some two stroke winter additives to the fuel, let it run for a second or two to let the additive flow into the carburetor and the rest of the fuel system. That should be fine.