$Gum
Ya know, you can make a pretty penny in some cities by just removing that gum from the sidewalks.
But why don't you contact Wrigley's about that. The restaurants in my home town used to scrape it off the undersides of their tables and sell it back to Wrigley's and Beechnut for re-cycling.
Here's what you do. Take a stupid celebrity, (redundant) the stupider, the more popular as a rule, and post each name you choose under each gum.
You have been collecting discarded gum from celebrities. That should cause the gum price to skyrocket.
LIE and prosper.
Kim Kardashian - $100.00
Paris Hilton - $1.00
Trump - $100,000,000
I don't think it's necessarily any more ridiculous than people paying large sums for Beanie Babies (not-special-in-any-way stuffed toys) or a Honus Wagner T206 baseball card (a piece of cardboard with writing on it).
Good luck with your new entreprenurial venture. I hope it "goes viral" for you...;-D...