Not expressing interest, but - just curious - is that the machine with built-in 44-pin IDE i/f ? Somewhere near the PSU if I remember rightly ?
Asking because I sold a Acorn machine a few years ago (should have kept it !!) but for some reason I kept its hard drive - a Prairietek 120 20MB 2.5" IDE - which claims to be the world's first ever 2.5" hard drive ! Mine is still working too