Create a top class auto checkout bot for shopify sites, nike, and footlocker/eastbay -- 2

I want to create an auto check out bot that will automatically check out a pair of shoes if directed to the URL. Once on the page of the shoes I want the bot to have all the information pre loaded so that it can select the size of shoe add to cart and complete the entire checkout process with credit card info and shipping and billing address. I want a bot for shopify sites, footlocker/eastbay/champs (all on the same platform), and nike. Heated sneaks is an example of a competitor. [login to view URL] Im not sure what time this will take to build a bot like this but I want it to be lightning fast to beat the existing bots that are out there. So please bit your most reasonable price even if it is outside the budget.