I know you pretty much never know what you're talking about, but in this case especially you do realize that a hefty portion of amiibos are currently sold via scalpers, right? Really, go on ebay and similar sites and they're just loaded with scalpers selling amiibos. You didn't think that guy walking out of the store with a cart full of 15 of each amiibo was just an avid collector, did you? Amiibos are a gold mine right now. You're basically guaranteed that any amiibo you buy for retail cost will net you a profit of double or more what you paid. That doesn't happen in a healthy market with only a small bit of scalping (well I use 'healthy' loosely here. healthy would mean equal supply to equal demand, but with Nintendo...we ain't gonna get that).
Ugh...You know that correlation doesn't mean causation, right?
Look...I know those amiibos are pretty damn popular and way more in demand than the current offering. Hence: people buying the things to sell them at higher prices. But those "ebay and similar sites" aren't loaded with scalpers...it's just that they are offering their goods there like everyone else. The fact that you see them is because you go to these sites and type "amiibo". Of course you'll find those guys selling them. It's not rocket science.
What you fail to understand is that this very action (going there and looking at that) is limiting your perception of reality. If you want to get a certain amiibo and you'll find it sold out everywhere but on ebay sites where it's sold at a higher rate...THEN it makes sense that someone will heist a truck full of 'em to join these sales.
But if you look at it on a broader scope, you'll find that as soon as the interest in those amiibo's lowers, those very salesmen (scalpers) will lower their price as well. And with this, you especially know it's coming, because nintendo just makes another batch of the things. It doesn't take a marketing genius to predict that the prices will drop. This is like stealing a truck full of pumpkins just before halloween. Sure, there'll be some people upset that their only way to get their decoration is through "scalpers", but after halloween passes, nobody is going to give a shit about those things.
I think you know this as well. The fact that you mention the "right now" in the gold mine is what I'm pointing at. As well as that you notice it's not a healthy market. I can't agree more: it isn't. Prices will drop. And if you think I "pretty much never know what I'm talking about", I'm willing to bet about it with you: within two years, the majority of those dolls will be sold on ebay for at best a couple bucks above the standard asking price.