How much price a pair of Altec Avalon’s.

I have a pair of Altec Avalon 837B’s that have been in my family since they were purchased new in the mid ‘60s. They are in pristine condition with all original components. Any ideas about how much to sell them for? I just don’t’ have room for them anymore. 
Don't know what they are worth now, but I'm an Altec fan. How about some photos?