Steve
If you're still looking, I have a Feinwerkbau 300SU, right handed, which I've just decided I no longer need, having moved on to smallbore. I've owned it from new since the early 1980's but it hasn't been used for at least 20 of the years since. I started using it again a few months ago and it seems to have been working just fine but I've come to the conclusion that smallbore is what I'm going to concentrate on. It's in good condition and comes with a number of foresight elements and the original paperwork and tool. Let me know if you're interested.
Martin