GM: You find a little wooden box.
Me (Human Fighter): I open the box.
GM: Inside the box is a very tarnished brass belt buckle. Everyone, roll appraisal skill.
Half-Orc Ranger: 18.
Elf Paladin: 16.
GM: Okay. *to the half-orc and the elf* You two see this belt buckle and believe it to be worth about 10 silver. *to me* You see this belt and believe it to be worth at LEAST 5,000 gold.
Me: Holy crap…guys, this belt buckle is AMAZING. It’s worth so much. We’re going to be RICH!
Half-Orc Ranger: I think you need your eyes checked. IT’s basically worthless.
Me: Are you KIDDING me?? This thing is the most expensive thing we’ve ever owned!! *grabs the belt buckle from the box and puts it on my belt*
GM: Oh, I should tell you. This belt buckle is incredibly tarnished, but if you look closely you can see a picture of a cockatrice on it. It’s very crudely drawn and surrounded by elven runes–can you read elven?
GM: Okay. So the runes surround this crudely-drawn cockatrice, and they say, in elven, "Check out my cockatrice.“
Me: …This is the fanciest thing I’ve ever owned and I love it.