The great thing about auctions like these is, if you didn't know these little keys were worth, like, $150, you'd look at them and think, "Okay, right, some little plastic novelty keys... What, five bucks or so?" But this way, you get to see how some herding effect occurred that induced a bunch of people to agree they were actually worth a ridiculous amount of dough. Otherwise you might never have known, because it certainly wouldn't be obvious.
And if you do end up winning them, you can put them on your keyboards, look at them, and think, "Hey, wow! I have some of those little skull-face keys on my boards, just like other people who have them. And since those people are so cool, I must be cool too. Indeed---although I think I'm doing something really cool and original, I'm actually mindlessly copying an entirely random thing some other people did."
Well, you probably wouldn't have that last thought... Otherwise you wouldn't have spent all that money on the little plastic skull doodads, right? But you might have it later, if the herding effect ever wore off. I'm just saying.