eBay is the best place. You will have a much broader audience, but there are fees of course.
You could also try The Acaeum or some of the Facebook groups, specifically
RPG Auctions or Facebook Acaeum. Since it's a highly sought after item, you might be able to get close to the same amount as eBay, without the fees.
Whatever you do, make sure that you have lots of good pictures and describe the contents as best you can.