I think a distinction should be made between the sharks on slickdeals -- the type of person who buys every single copy they can, doesn't mind having hundreds of dollars or more tied up in stuff, and has express plans to put them onto ebay as efficiently and timely as possible -- and people who buy a backup to keep sealed "just because". maybe as a backup, maybe to collect and hold onto for years, maybe trade or sell, sure, but no specific plans.
This is a difficult argument to make, especially to anyone who wasn't able to get one, but I think there is a distinction.
In the case of the MM LE, it's been available at several stores and there have been multiple windows of opportunity to preorder, including the $85 gamestop guide bundle, which if I recall was available for hours or more. Compared to some amiibos, such as Rosalina, MM LE is/was a cakewalk.
Me? I like the hunt. I like things that are hard to get. It adds an aspect of adventure to shopping -- I don't want every item to be like this, no, of course not, but the occasional rare LE is nice, and I so much prefer a LE that actually IS limited, rather than most video game LEs which are available in such high quantities that they don't feel at all collectible.
I already had an MM LE preorder secured at amazon, but still went for the gamestop $85 bundle. While everyone else was busy pointing out what a scumbag store gamestop is, I went and placed an order. Any of you who were posting about Gamestop being lame at the time could have. $85 is cheap compared to what they're likely to go for on ebay.
Whenever demand exceeds supply, a secondary market will exist. The idea that demand would outstrip supply and no secondary market exists is an idea so illogical and impossible that I don't understand what you guys are asking for. Yelling about "scalpers" is just as constructive as yelling about a coming storm. Operate within the world that exists. Try and get to the checkout before the scalpers do. Try to get out of your house before the storm arrives. It's just life.