We're not sure why, but the 'boy version' of Polly Pocket, Mighty Max, really didn't do as well as Polly Pocket herself. The concept was the same: tiny everything, except instead of garden parties and powder rooms it was monsters, creepy crawlies, and haunted houses. Maybe it was because it was considered 'Polly Pocket for boys' that it failed in the end. We'll never know, but we still think Mighty Max was pretty cool.
If you own a few old sets of Mighty Max, they're not going to bring in as much cash as vintage Polly Pocket, but they're still worth digging up if you've got any stored away. Depending on the set you have, you could get up to $200 for it. It's definitely worth a 15-minute search in the attic for that old box of toys.