^
Again, I'm saying to fund your collection, to keep your hobby money moving circular for you, not to actually try to cut a profit and keep it.
The Scars and Celtics move for pretty good coin now. And they also make good trade fodder. I don't know if the newer releases will be that popular, but the secondary market value for the stuff is strong, the loose parts market for it is very strong. I know some guys who did that with The Dead series. They bought a couple, kept one, sold the spare later to pay for both and if they made a little extra gravy, used it to help fund new stuff they wanted to buy.
At some level, it still comes to Buy Low/Sell High. For some guys, it's a way to keep from getting priced out and still collect the things they think are cool.
Yes, speculation, even very short term, for action figures is kind of nutty. The value of this stuff gets really really volatile. But if you had to pick a line or brand to take a risk with it on, people could do worst than some of the niche SST/HT stuff.
Like I said, I see where you are coming from with your point, I'm just saying in a very very small scale way, it's a strategy to make collecting this stuff a bit more cost effective.
GG