Where would you sell your vinyl collection?

Contact the Presidents of the Philadelphia Area Audio Group and the New Jersey Audio Society and invite their memberships to a garage sale.  Princeton Record Exchange will give you only pennies on the dollar. 

Thanks so much dgarretson I never heard of either I’ll look them up. I really appreciate the info! 

Can you provide a link to your Discogs sales?  I'd like to look through what you have.

@dgarretson - I know those guys- total record hounds. Friendly with Ken G. who is quite a collector, not so much of 'audiophile' stuff, but more obscure jazz and prog. We've been trading notes for several years on records. good suggestion. 
Agree that any sale of the entire collection is going to yield pennies on the dollar. That's the nature of the business. 
The Hoffman forum has a very active classified section for members, but you have to have at least 50 posts to even access it. They are big on classic rock and audiophile stuff. 
I buy pretty frequently from E-Bay and Discogs, as well as private dealer sites. (obviously the latter doesn't really help you unless you have a web presence). There's also a fair amount of trade on Instagram, if I'm not mistaken, but I don't use it. Any approach which yields maximum dollars involves your time to post, deal w/ bidders, payment, shipping and issues that come up. 
I got rid of a ton of records via a guy in Woodstock, NY who was willing to pick them up, post them on sites, collect the money, handle shipping and send me a 50% check periodically. I trusted him and most of what I was getting rid of wasn't particularly valuable, it was voluminous though. (thousands and thousands of records over the course of a few years in anticipation of a move). I think Dgarretson's suggestion is excellent, particularly given where you live. That Philly crew is pretty serious!

Unless you need money badly don't sell your favorite records, or any records that you listen to.  Don't let others feed on you.