I passed on a Leica projector a few weeks ago ( Pradovit ? ) it was in a junk shop for the price of a few beers. I already have 7 projectors
I bought one many years ago, got given 3 more, and then a guy who lived up the road moved house and threw loads of stuff in a skip / dumpster. I salvaged 3 professional Kodak carousel projectors, about 20 carousels, 2 screens, a Jobo enlarger and a pile of darkroom stuff and about 15 photography books. I was a bit disappointed he didn't throw his extensive collection of Leica cameras away though.
I like to see my slides on a screen though, forget pixel peeping and all that crap, just blow them up as big as the room will allow. It's fabulous.