Merchant:
"Stranger, stranger!! Now that's a weapon!!!"

The Merchant will sell you weapons and upgrades. He'll only sell you first aid spray if you have virtually no healing items in your attache case. Any treasures you find can be sold to the Merchant for a number of pesetas. Whenever there are new weapons or upgrades available, it will say 'list updated' on the shop screen. You can also buy a treasure map at certain points in the game to help you locate treasures to sell, to fund your purchases.