Hello,
I would appreciate if you could answer the following questions:
Do you need any kind of GUI for the application where you could enter the keywords, price range, the credit card info?
Do you need to save search info so you could repeat it?
Have you ever used bots like the one you ask for? If so could you tell the name of the software you used?
Looking forward to discuss the opportunity over freelancer.com chat
Regards,
Harut Grigoryan