I am wanting to build a website similar to www.collegeswapshop.com and www.studentretail.com. I think I will need a classified script, but I am not sure. I do know that I want users to be able to search by ISBN, authors, and a couple other ways; in addition to having only students register by using their school email address.

I know I have tried asking people locally for help and have been trying to offer compensation to those who are able to create a custom script, but to no success. Since I don't have much money free will be best, but I will try to find a way to pay for it if needed to.

Does anyone have any recommendations? Thank you in advance.