CD/Vinyle Estate sale question

Hello, this is kinda a weird question 

i own a funeral home home and a family I am working with (friend of my family) lost a family member who was into music.  He had a really nice home theatre setup, stack of amps and misc 2ch and HT gear all of which looked to be  extremely well cared for.  

The family doesn’t know what to do wit8h some of the audio equipment and mostly CD’s and vinyl records.  Estimated somewhere between 5,000 and 10,000 records and CD’s, the family thinks possibly closer to 10,000  all of which are classical music.

any suggestions on a way to determine value or a place to sell them or get a value?