I think it is a PTC resettable printed circuit board fuse and have zillions of them.
Beige colored, rectangular 0.40 square by 0.20 thick. Two single ended radial leads on 0.2 inch centers Shiny dipped epoxy.
Part number is
*600 150 QU1XOther side says TAIWAN.
Low current resistance is around 8 Ohms.
What is it, who made it, and what is it worth?
I suspect these sell for forty cents each.