Looking at DISCOGS is a good idea for a general ballpark price and i would direct you to JAZZCOLLECTOR.COM which is a site devoted to the tracking and discussion of the ebb and flow of Jazz records sold on Ebay and they have a alphabetical list of records and prices.I just hate to see people get boned on their record collections,unless of course,it is i who do the boning.Insert annoying snide smile icon here.
Truth be told,you are a dolphin in the shark infested and highly competitive waters of the buying and selling of records.Most collections usually house a small percentage of truly valuable records,once you research them you might try selling these yourself on Ebay.Let the market determine the value.Good luck!!!!