No, this is not an ad for Mastercards. But I was just thinking about those ads where they put a price on 2 things and the third thing they put as priceless.
Something like: Phoebe's soda can (TOW The Thumb) - $5
Monica's boots (TOW Monica's boots) - Ridiculously expensive
Ross's tan (TOW Ross's Tan) - Priceless...
That's probably a pretty lousy example but give it a shot!