I have a case of wrapped "The Monkeys" cards with gum inside each pack. The case is in pretty good shape and none of the packs have ever been open. I think the case is around 30 years old. How would I find out how much they are worth?

eBay is my favorite source for checking prices of collectables. Find other cases - or even packs - and put them on your Watch List to see what they finally sold for.

I'd guess an unopened case of original Monkey's cards is worth a small bundle.