You can save a TON of money with the eBay listings below. We found Scooby Monopoly sets starting from a little on eBay.
At the eBay prices, this set seems like a solid investment, especially if you can find a mint one still sealed in its selophane. Scooby Doo is a hugely popular franchise, especially since they began making movies based on the original cartoon series.
Dozens more Monopoly pages on Boardgame Beast are linked below the eBay widget.