Contact Ian @ GreatCollections. They are a smaller auction house who are specializing in the less than blockbuster coins & collections. Go visit the site, you'll see a lot of material that will look a lot like what you have to sell.
I've bought from them, and spoken to Ian and Raylene at a couple of shows. Good vibes, but there are some reports that are less glowing. YMMV.
As with any sale, you aren't going to receive what you think of as full value. The NGC price guide is an optimistic view of what the buyer would pay. You'll receive less than that because of auction fees - or if you sell to a dealer, because s/he has to make a living and that living is the difference between what they buy it from you at and what they sell it to me for.
-----Burton
50+ year / Life / Emeritus
ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
Author: 3rd Edition of the Sample Slabs book,
https://www.sampleslabs.info/