I guess I have to start addressing all the BIG and IMPORTANT collector rules that we all know, but somehow keep breaking and end up regretting it.
Rule #1 Collect what brings you joy.
Sounds dumb right? Wrong. Too many people collect stuff they do not really care about as an item, but only see dollar signs and profit in it. They are not collectors- they are dealers (and generally greedy ones as well).
If you get a tingle in your toes when you see a Speed Racer lunchbox, that's cool. If you read a story about how you can make big money in matchbook covers and start grabbing them up, that's not cool. The reason? Collect as if the resale market for your stuff was to become non-existent. Then if you are stuck with a room full of worthless Pee Wee Herman memorabilia they will still be of value to you. (or you can give them to me cause I love him).
Digression- stupid collector thing. I found a large talking Pee Wee Herman doll at a yard sale. It was cheap because the voice box was messed up and it spoke way too fast and high pitched. I snagged it, found a long wig, put it on the doll, and made an instant Cousin It doll! I am happy, and people are amazed at it.
Ok, back to the rule. A lot of people collected Beanie babies. Most thought they would be come rich on them. Most ended up with a room full of dumb worthless little stuffed animals they ended up giving away to kids. They wasted their time and money, when they could have been collecting John Wayne commemorative plates and actually LIKED them.
So collect stuff you like! People that aquire things for resale are not collectors. They are dealers. If these dealers really don't care much for the items, then they are dealer scum. The ones that don't care if they screw over a new collector, or fake something for additional profit.
However, if you buy a Shirley Temple doll for love, then find a better one and want to resell the older one to another collector so get some money to put into more collectible stuff, that's fine. You care about the items. You want to see them go to good homes, preferably with another collector.
When they die, a true collector wants his (or her) collection to either:
A. Go to a museum.
B. Be sold off to new younger collectors with love of the stuff.
C. Take it with them.
As for me? I prefer C !