Call ahead to find out when the buyer is there and bring them on down.
(Beware -- the trade-in amount is only good for 7 days, and it can change wildly in that time!
Either way, check out this list of places to consider when it is time to part with your treasured comic book collection.
e Bay is still the king of auction sites and is a great place to dump any size collection.
If you have a lot of old and more pricey comic books, then I would suggest you take a look at an auction site like Heritage.
They have a pretty diverse fanbase of collectors that are always on the lookout for a great Golden Age or Silver Age comic, so if your comic books are from the 70's or older then this is a great place to look into.