I need a computer scientist

I want to set up a bot project that is scalable that can buy trainers from certain trainer websites. Robots are the only things that have a chance of getting specific trainers. I understand I can buy these robots if it is unfeasible to create a robot from scratch. And just have you set it up. I would like it to be able to crosscheck prices on Stock X and be able to to purchase shoes that are cheaper than the price listed by a certain amount. This is the general idea.