3rail's post above is an excellent summary.
Here's a thread that covered the topic awhile back - https://ogrforum.ogaugerr.com/...1#149239177148621341
A lot depends on how big the collection is, condition of the items, and where you are located. I recently wanted to get rid of a modest amount of LGB. Did my research based on SOLD prices on eBay and decided to send my stuff to Stout's. (The number of items was not sufficient for them to come and pick them up, but fortunately I live close enough that I was able to deliver them to Stout's.) The amount that I received was close to what I would have netted after selling on eBay, but without the hassle of posting, shipping, dealing with returns, etc. Going the auction route was well worth it in my opinion.
Wishing you the best of luck.
