dont chuck it out (if you are going to send it to me ), wd-40 the heck out of it that should get most of the rust/junk off the crank (let it soak for over night) , then get new bearings (may be able to wd40 those as well, but prob not, its worth a try) and you should be good to go.

is your conrod/piston rusting at all?

i cleaned a engine, that looked similer to yours. only it was a bushing engine
i dont use after run and none of my engines look like that