Im starting a new virtual pet site and needed a script for it now i have the images ready for everything even a template designed i just need the script with the front and backend.

im wondering whats a good price for such a script??

That depends on what type of pet site you want, how complex, and if there are specific custom features needing to develop. I would suggest either looking through prebuilt ones and if one suites, then try it, otherwise, find a coder or company to do it at a price that seems fair.