They appear to be the IF version of the Zeiss 8x30 B/GA Classic C (or 20 years ago the Zeiss 8x30 B/GA Dialyt) so perhaps hunting for eBay or classified prices on that bin might give you a hint.
But in general I find used 20 year old Zeiss Dialyt's are usually seriously overpriced compared to modern bins.
Another route would be .... how good is it compare to a current CF Zeiss 8x30 Conquest and price it down from that?
Or take the highest price offered (the market method of pricing).
Last edited by KevinPurcell; 11/30/08.
