Bought 4 huge binders of "gold" dollars and kennedy halves in 2x2's for the $2100.00 asking price- Sold $1922 FV in common stuff (some S mints and other nice looking stuff) for $1950 cash on CL. Sold 99 proofs on eBay for $170.00 - Kept $700 worth silver halves for just about nothing ($700 silver value, not $700 FV) My fav. is the BU 1970 Kennedy - Whoop, Whoop.
Got a typewriter for $0.25 at a thrift store and flipped it quick on CL for $30.00 to a bright eyed young lass.
Got a tandem bike for FREE and flipped it for $150 on CL 2 days later to 2 college kids who were psyched (and likely stoned) out of their minds. Hope it gets them laid, haha.
That's just the last week. People ask me where I get money to buy coins and guns, and this is the answer. While they are watching the booob tooob, I am flipping stuff.