In links awakening, There is a shop in the first area of the game. But some of the items are overprice and take a long time to get that much ruppes. You are able to steal the items you need from the shopkeeper.
1. Grab the item and try to distract the shopkeeper by moving around in circles around him. And run out the door.
WARNING: Once you return to the shop. The shopkeeper will kill you. No kidding.
2. By a glitch. (But you need to have the ruppes for the item) Grab the item you want. Talk the the shopkeeper and press Start+A+B and choose Save & Quit. When you return to the game, you will have the item you want.