Larry: Your collection is looking good! But actually the figure I like the most is the Mario Sunshine one, my personal favorite of the series. Where did you pick that up?
It is the JoyRide/Nintendo Power Super Mario Sunshine figure, released in 2003. The Luigi is from the same line.
I got it off another user here for $60.
His arms and legs are poseable, and he can be taken off Yoshi, and Fludd detaches.
There are some on eBay right now, with the cheapest complete one being $85 open, $130 new, and $45 - $60 with broken/ Missing Fludd.
Luigi's Mansion is VERY rare, he is never on eBay, and loose ones are always incomplete. I got mine for $180 NEW recently, and opened it.