G'day. I've got a MIYATA Sportrunner MTB, from the late 80's I think. Biopace cranks, centre pull brakes, Gearing is Exage Country, 18sp. Both derailiers operate. Front wheel is almost cactus but rear looks ok with fairly new, at the time, stainless spokes. Frame is 18" and says that it is 'triple butted'. Needs a good clean up or just use the frame.
I've also got an early to mid 90's GIANT ATX 870. Alloy frame 18". V brakes, 21sp. It has a cheap and nasty set of shocks on the front but I have the original unsuspended forks to go with it. No front wheel or seat post.
Both taking up space and I don't think I'm ever going to rebuild them myself. $30 each or $50 for both. Pick up only.