Everyday you will be offered swords at different conditions and rarities, your goal is to make a profit. This is accomplished by buying swords for low prices and selling them at higher ones. Every sword you buy has a certain chance to sell at night, and if it does, you will see if you have made a profit.
Owning a shop is rather difficult, but over time you will grow your knowledge of swords to make profitable purchases. You can also upgrade your shop to get better swords, conditions, prices, and sell chances.
With 100 swords in the game, try to collect them all, and become the ultimate sword shop owner. This is not an easy task, and only the best will be able to accomplish it.