One of these days I'd love to have a real stereoscope, but for now I'll be happy to have an embroidered one in my quilt.
I see them in antique stores now and then, but if I bought one, I'd have to keep it under lock and key. My kids are fairly good at not messing with the vintage and antique stuff, but I'm not sure it would be fair to put out something that neat and expect them to keep their hands off. And they all look so fragile.
For now, I'm contenting myself with picking up the cards when I find extra cheap ones at estate sales.