From time to time, I take a look at older collectibles which I think are quite iconic.
When Tony Stark has to replace his Arc Reactor in the first Iron Man movie, Pepper Potts makes him a memory of it, by adding a display case and a surround entitled 'Tony Stark Has A Heart'.
Quite some years ago, Windlass Studios got the rights to make a licenced prop replica of the movie prop. They never specified exactly how many were made, but they are pretty hard to come by now.
Here's my review of one: