Many a man thinks he is buying pleasure, when he is really selling himself to it.
— Benjamin Franklin

Making money selling manure is better than losing money selling musk.
Egyptian Proverbs selling quote

Art is making something out of nothing and selling it.
— Frank Zappa

Everyone lives by selling something.
— Robert Louis Stevenson

If my mother knew I did this for a living, she'd kill me. She thinks I'm selling dope.
— selling quotation by Henny Youngman