Ebay Trading
You buy stuff cheap from one eBay and yell about it on another eBay for way more cash. It’s trading, but with more yelling and less brains.
He bought a broken computer for $5 and sold it for $50. The computer didn’t work. He didn’t care.
I bought 100 books for $1 each and sold them for $10. My books are now rich.
She bought a used fridge for $10 and sold it for $100. The fridge didn’t work. She didn’t care.