Buying the contract before the first ninja fight is one option, but you can also buy the contract at any point after that from the City Wok vendor menu. Kim, the owner of City Wok. Simply go to any vendor and sell all of your junk components. You want to sell them in the highest quantity possible if you have more than that in your inventory. Now buy all of those same items back in the highest quantity possible again, if you had more than. You make the money from selling the items, then essentially buy them back for free. Things like a Maximum Antidote work even better due to the higher selling price. Bryan Dawson tfnw an extensive background in the gaming industry, having worked as a journalist for various publications for nearly 20 years and participating in a multitude of competitive fighting game events.