These things are pretty fun to use. And if you find them, they should be dirt cheap. I know someone with one and I think he bought it new from gamestop for $8-$10.
It’s definately not high quality, but I’ve felt much much worse buttons than this.
2 noteworthy problems with it:
It’s really light and basically impossible for 2 players (or even 1 player) to use without adding a lot of weight or putting something under it to keep it stuck to the surface it’s on.
The PCB burns out very easily. I’ve known of 3 that friends of mine owned. 2 of them burned out completely and the third only has 1 working side now. And I would say all 3 get less than average use.