Finding gold can be arduous; when you do, you want to keep it to yourself. It's why people “gatekeep” their favorite artists, songs, and movies, scared that if people knew about them, they would ruin it somehow.
One can find some of the best things at estate sales. The auctions, held to dispose of the properties of a recently deceased person or one who has to move, may be overcrowded. Still, you will find some of the coolest stuff if you are early enough!
These groups and giveaway sites have gifted folks some of their most prized possessions. Giving through these sites also help declutter items you no longer need, so you're killing two birds with one stone.