I was on my way to a work meeting and spotted a couple of interesting items in a second-hand shop. A Yashica Mat 124G (one of which I already have) for €75 and a Yashica Electro AX with Yashinon DS-M 50/1.4 for €25.
The 124G seems to be mechanically fine though the light meter is either broken or (more likely) needs a new battery. I still have a genuine battery in my other 124G so can test with that but may finally need to hunt down or make an adapter for more modern ones. It came with the bottom half of the case and the lens cap, no top half and no hood.
The Electro AX is M42 mount & I think needs the same battery at the 124G. Mechanically it seems fine and the shutter fires but probably just at 1/1000s without the battery. The lens seems OK, a bit of dust but no auto/manual switch to allow stopping down on digital. It's this one:
https://www.pentaxforums.com/userreviews/yashinon-ds-m-50mm-f1-4.html
Anyway, I think even if the light meters are dead I got quite a bargain with both of these. They had a little Minolta rangefinder too but I had no more cash on me.