Bluebook for used records?

Hi, a friend of mine has a collection of early latin music on 33's and on 78's. Is there a bluebook of sorts that gives market prices on used vinyl?

Thanks, Jeff
No. Best bed is to go eBay with two or three and see what the traffic bears.
There is a well known catalog, called Goldmine's. Maybe you can find it via Google. I don't know if it lists the very obscure recordings you seem to want to know about, but maybe it does. Estimated values are given for every cut or re-issue of a given LP.
As for eBay values, i recommend