Show makes your character show one or many items in your inventory to a shopkeeper. The shopkeeper will respond with telling you how much the item is worth if you were to sell it to that shopkeeper.
"show stuffed pink elephant to Karcas"
You: Karcas says [to you] : I'd be willing to pay 0 gold coins, 0 silver coins, 5 copper coins for a stuffed, pink elephant.
Anybody: Karcas says [to Hotblack] : I'd be willing to pay 0 gold coins, 0 silver coins, 5 copper coins for a stuffed, pink elephant.
EXAMPLES
"show white lily to Karcas"You: Karcas says [to you] : A white, water lily is not worth anything to me. Anybody: Karcas says [to Hotblack] : A white, water lily is not worth anything to me.