Well, I received parcel yesterday. Inside rested comfortably OM1n in black, wrapped in bubble bag. Beautiful camera is aging gracefully and still looks good, some brassing on corners even adds to the character.
Good news first - camera was definitely CLAd by John Hermanson in 2008, his sticker resides on the film chamber inside. Camera was modified for modern batteries. Camera feels like... well, precise picture taking machine, all controls are smooth and viewfinder big and clean.
Some bad news - shutter was erratic in the beginning, second shutter curtain either didn't close or timed 1/60sec (to my ear). I know it sometimes happens to mechanical shutters due to inactivity, so I clicked away for some 10 minutes and shutter went to normal - all shutter speeds sound accurate (save for 1sec which is more 2sec, if you ask me).
Question is, what are chances shutter will misbehave if camera left for some time (weeks) in storage? I have no idea if I should contact the seller for shutter issue - anyway international shipping excludes possibility to return camera, and I actually like the camera!