Gas
I find this true in everything I collect. I do collect a lot of things, German daggers, medals, bayonets, US fighting knives, Firearms, toys, silver coins, beer items, etc.
I'm 74 now, and have been doing this from a very young age.
Everything that I am looking to acquire now is top price.
The big collectors will not sell anything at a great price, I must keep a eye for the guy walking the isles trying to sell, there I can get a good price, because the dealers still feel they have to make a large profit.
Thats just the way it is with everything, even eggs. Eggs here are under $3.00 now, and still going down.
Good luck to all at the SOS, have a great time.
Ed