Cant match that for price, but some years ago I bought (£80 each-ouch) two lovely, high quality flat linear slides complete with ballscrews and stepper motors
with a view to using them as the Z slides on a twin head lightweight router to cut out the 1.6mm ply parts of my dollhouses. The travel is about 50mm and I think the ballscrews are about 6mm.

Any suggestions? To small for mooring weights and I'm too old for marital aids.