Depending on the types of coins Gerry Fortin Rare Coins is also a good outlet. He has good personalized service and low commission rates compared to the bigger auction houses. If your items are not in his wheelhouse he will let you know.
I highly recommend David Lawrence Rare Coins. Been consigning thru them for 1.5 years and happy all the time. I have tried GC but they just don’t seem to sell for much. I broke some all-time low price records for a complete Walking Liberty Half collection I sold there in 2019.
I guess as a seller DLRC seems to do well as far as sale prices are concerned. As a buyer I find most of the bids to high for my blood.