I went a step further and tried to make a gallery out of the images by hanging them with cotton, and decided that the 'priceless' sentiment from the Postage Collection set had a slight look of the kind of note you'd find on an art gallery wall.
Stampin' Up Products:
Paper: Whisper White. Kraft
Stamp sets: Postage Collection, Pedal Pusher, Jar of Love
Other: Postage stamp punch, Gold embossing powder, Candy Dots
Other Products: Faber-Castell watercolour pencils