Curt's dream enlarger looks like my worst nightmare, its from the dark ages before we got great colour heads, excellent for variable contrast papers.
That Zeiss looks interesting but the seller doesn't know the market, you can get a great De Vere 10x8 for far less from the manufacturers, reconditioned or new.
Oh Curt, I had an old enlarger I was giving away for free to anyone who could collect. But I'm a continent away from it now, and it will get scrapped when I return to the UK.
Ian