A donkey for a trade
A donkey for a trade means you got a better deal than you expected. Like when you realize you're dating a celebrity and you're just a normal person who still smells like breakfast food.
You told your friend you were dating a rapper. He said, 'You got a donkey for a trade.'
Your cousin asked you how you got a scholarship. You said, 'I got a donkey for a trade.'
Your mom said, 'You think you're special? You got a donkey for a trade.'