Clothes Dryer repair?

I got a GE dryer and its about 10 years old. The motor doesnt start up anymore, sort of just hums and then starts to stink. Its not the belt as it wont even start by itself with no belt on it. Its not seized as I can spin it with my hand. A replacement is anywhere from $30 for a used pull to $481 for a new one! Im thinking its the brush(s) but all I see is one plastic arm under tension that rides on a slip ring. Its sort of a Skeleton frame and there is very little to it. The arm is part of a contact block and there are a set of points in there that looked pretty black, I think its called an inertia switch? Just read that you might be able to file them.....Anyway, thought it may be a simple brush replacement, maybe not? you can see the burned points under the shiny points...This part seems to be unavailable unless you buy the freakin motor.....?