I picked up a Ricoh XR-M (also known as XR-X) on Friday for €25. I mainly wanted the lens (a very good condition Sigma mini-wide 28/2.8) and my initial testing show it to be every bit as good as it's reputation suggests. It has an extra pin though I'm not sure it's the unsafe Ricoh pin or a different one, it's used to allow modes other than M or A on compatible Ricoh SLRs. I'll need to have a look later but for now I've tested it on my Fujifilm X-M1 where any extra pins are not an issue due to the lack of AF (obviously) on the adapter.
I'd never heard of the camera but I googled it and it turns out it was Ricoh's top-of-the-line model in 1987. It seems to work perfectly and the big grip with four AAs in it makes it very comfortable to hold. The feature list is much better than most of my film SLRs and the viewfinder is very good. Top shutter speed is a respectable 1/2000s. I might need to look further into legacy Ricoh SLRs.
Here's a quick phone snap of it.
Ricoh XR-M, top of the line in 1987. With a Sigma mini-wide 28mm f/2.8. by
Jonathan MacDonald, on Flickr
I also got a Minolta X-300s because I've wanted a second SR-mount body for a while so that I'm not limited to one film type when using my Minolta lenses. It was marked at €18 but they only charged me €5. It's not as flimsy as I expected it to be but it has a common fault with this model whereby a dodgy capacitor doesn't allow it to turn on, but from what I've seen online it's quite easy to fix, I just need to track down a suitable replacement capacitor and swap it out.