Disposing of old collection.
A friend recently acquired a collection of cards (mostly baseball) assembled in the 1990's. Most of the cards are older but I doubt there are many if any of the rarities. All the cards are in excellent to virtually perfect condition. There are several thousand.
I'm looking for advice on how they can be sold. The collection is in NW Indiana. The owner is aware that these require extensive effort to sell and not to expect eBay prices.
Any advice is greatly appreciated.