"Give a poor man a gun and he can rob a bank.
Give a poor man a bank and he can rob everyone."
Anon (Heard on the radio!)
If you're going to look for a Zuiko F/1.8, try to track one down which says "made in japan" on the front. The lens was subject to at lest four different variations though out its life, and the 'made in japan' ones have the best image quality. Not that the other ones are bad.
The two main things which can blight OM10s as they age are rotted seals round the door-aperture and 'sticky magnet' syndrome. Both can be fixed at home if you're a bit dexterous.
Hope you enjoy it.