You're right, people do collect stuff hoping to make a profit. If I sold all my Indy stuff, I would make a lot more money off it than I had paid for it. But guess what? I still enjoy my Indy collection! Why look into selling it?
Just as my sisters and I plan on inheriting my parents' collections, I hope my kids can enjoy my action figure collection as much as I have. I am never, ever going to sell them unless it's a real emergency. Since I'm only 19 and still live with my parents, that's not gonna happen for quite a while yet, it's unlikely if I ever need to do that, it won't be in the near future.
And as for these "collectibles" posted in this topic, they're once again not to make a profit. They're for your own enjoyment. How many people are gonna even know what Lao Che Airfreight is unless you're a die-hard Indy fan anyways?
And as said, you don't know what's gonna be good. If you go out to invest in stuff already worth stuff, you're paying quite a bit to get that stuff. And what happens when it goes down in price? Once Hasbro or someone makes Indy toys, the old Kenner and LJN stuff will decrease in value. It won't hit rock bottom or anything, but it will not remain as high is it is now. And the new Indy toys that they might make, like most SW toys made since 1995, will probably be worth nothing because they make way too much of it and no one will want it because they already have it. And if you are only doing it for the money, you won't get anything out of the whole purchase! At least with those who do it for the love of collecting, they will get satisfaction out of that worthless item.