pricing in Bordeaux

[Annette]

Hi,
I know I have posted here before and have not gotten responses, probably because my question has been pretty vague. But, I am still in need of information for a senior project/paper that i am doing on pricing and how it is determined in Bordeaux. I have narrowed down the wines I am looking at from all of Bordeaux to Chateaux: Lafite-Rothschild, Latour, Leoville, Pichon, Ducru-Beaucaillou, Palmer,Petrus, Figeac, Lynch-Bages and Yquem. If anyone here can offer me advise on where to find data on opening prices and/or variables contributing to how a wine was priced in a certain year (back as far as late 1960s), I would really appreciate it.
Thank you from a desparate student,
Annette