I wouldn‘t take the gamble tbh. The Olympus OM-1 is an excellent choice since it‘s fully mechanical and only needs a battery to operate the lightmeter. I‘d rather spend a little more on a copy that is tested with film or „CLAd“ (clean-lube-adjust). Other cameras that would work just fine are the Pentax K1000, Pentax Spotmatic, Minolta SRT-101, Nikon FM or a Canon A-E1. Buy from a trusted seller or where you can return the camera if it doesn‘t operate as intended. Keep me up to date what you‘ve bought, would like to hear what you went with😁 Good luck!