Pocket knives I just love the dang burn things.
Debt.
I'm going to sound like a nerd.
1st editions. But only from a few writers. I checked recently and one book I paid $100 for is now $1,200.
Silver dollars. Trade, Morgan, Peace. My Grandfather started me.
Flashlights. You carry an umbrella when rain is in the forecast, well, it gets dark every day. I don't have lots, but what I have is good.
InFisherman. More an accumulation. I'm a charter member and have every thing Ron and Al Lindner or Bill Binkleman have published since the beginning of time.
Fishing tackle. As you might have assumed from the above.
Guitars and shoes. My fiance finds it very amusing that my shoes are worth more than my car.
Barber items (other than razors). Old hair tonics, aftershave bottles, signs, displays, clippers, brushes etc....
I don't know if Cigars count as something you collect, but I have humidors in every room of the house. Except the bathroom, because c'mon, that'd be weird.