snakedreams...at one time I had an enornous collection of H:O slot cars. Some of these from the '50s and '60s were very valuable, in or out of the package as long as they were in mint condition. The difference in value was slight.
That said...current "collectibles" are going to take forever to gain in value. These days, too many people are putting things away in hopes of these items being very valuable in the future.
There is no sure-fire way to guage what will, or will not be a hot thing in the future. Most of today's items are simply too mass produced to ever see the values that we have seen in the past. Remember, back in the '50s and '60s things that are now collectibles were simply products...no one ever even thought about them beingworth something in the future. So, they were used up and discarded, and are now collectible.
Geez did I get long winded. My experience in collectible taught me a few things.
First. Buy things you like, because you like them. Do not buy for potential future value.
Second. If you will better enjoy these out of the package and on your desk, in a case, whatever...do it and enjoy. If you are enjoying it...why worry about the next guy down the line. Have it your way.
Third. The only people that make money in collectibles are the dealers.
Again...do what you want. Enjoy these things. Chances are, (with exceptions) that by the time you are tired of them and ready to sell...you'll belucky to break even.
One final note. On my desk at work, there has been the Hot Wheels Red-white-blue Viper GTS in the plastic case. A friend of mine is a Hot Wheels collector and has been trying to get it from me for a long time. He says it is valuable and that it should not be on my desk...it should be put away. Well, you know what? Everytime I see it, I am glad it's there and I like it. How much would I enjoy it if it were stored ina box in the closet?
(For what it's worth, at one time i had a Matchbox collection of over 3000 pieces, and a H:O slot car collection of over 1000 pieces.)