Suggestions on disposing of a collection of jazz vinyl

A audio friend of mine passed away recently and left behind his equipment and about a 1,000 lp collection of jazz music.  He was an audiophile and built up this collection over decades.  I am helping his wife dispose of the equipment and records.  I am looking to find someone with experience or knowledge on how to proceed with the vinyl collection.  Many of the records are valuable due to first pressings and since he was an audiophile they are all in excellent condition.  She is not looking to make a bunch of money but wants them to go to a good home.  I however, what to make sure she doesn't get taken advantage of.  Thanks for your thoughts!