Payday is a lot of fun! I used to play it all the time with my family when I was a kid. In fact, the last time we visited my parents we busted it out and played a round. It's always good for entertainment!
Lost Treasure has an electronic component which always makes a board game more fun. But it's definitely one of those "much better with 4 players", meaning "pretty lame with 2 players" type games.
Frogger's worth the $3 because, well, it's Frogger, and we're on AtariAge, LOL, but in terms of actual gameplay, it's not much fun. Good collection piece though, and $3 is a heck of a deal.