I used to have one of these as a kid, and still had it as recently as 1986. I'm now unable to find it at my parent's place :/
I'd love to pop it into the display case next to my SDS E-11 blaster.
I'm not looking for mint condition, and not in a box, as I'd only take it out of abox and play with it anyway - I mean display it!
Mine was complete and working, though that's not important anymore. It had the three-position folding stock, though one side was broken and expertly fixed with tape
So on the off-chance someone has one kicking around that they would consider selling off, I'd love to hear about it!
Cheers