"Artoo, make sure you watch our credits." "My grandpa always told me 'Don't watch your credits; watch your health'. So while I was watching my health, someone stole my credits!"
He swindled C-3PO out of thirty two credits when the droid was shopping for jogan fruit. He first stated it was four credits, then sixteen credits, before finally settling on thirty two. During his haggling, Droogan relayed a supposed saying of his grandfather by telling C-3PO to watch his health, not his credits.