ISBN SEARCH BOX

ISBN SEARCH BOX

I have two main question. First, I have a business website are any of you guys able to make a isbn search bar that my customers can receive quotes of how much I will pay them for their books? Example it looks like a search bar except it says sell your book here. customers types in isbn number into the search bar a receives a instant quote. or will that be to complicated for this type of website. second question, can I set up untied postal service  for the customers so they can print of the packaging slips right from their website?