So partly based on this thread I got a Yashica Samurai X3.0 in the post yesterday... £22.50 + P&P + new battery which wasn't very much, so maybe £30 total. I put in a roll of expired Neopan 400 and took it out into the sun. It's a very different sort of beast to the IS-1000, being basically an high performance snaps camera with barely any manual features, but it's a lot of fun to use - I burned through the whole roll during a day when I was technically at work.
The vertical grip is pretty secure - it's one of the few film cameras I'd use one-handed, and with your other hand on top it's very solid indeed. The AF is... well, okay in the daylight anyway, not great in poor light, but it seems to have worked fine. And while I've not finished scanning the roll yet it appears that, even on 10+ year expired film and in half frame, it's given me surprisingly sharp pictures. WOULD FILMWASTE WITH AGAIN.