What do you regret NOT buying?

Barney Duff Balloon, different from the Super Bowl Duff Balloon. I think that was from the first yard sale, last year. From that yard sale I wish I had also purchased the Frink mobile and the Giant Grasshopper.

Boobarella and the Ghost Zapper from Halloween. I actually like seeing Boobarella doing either of her out door tasks, especially when they are on Squidport.