Hi,
Hope you doing great.
Surely I can help you with this but for that you need to share URL of website you want this to be implemented. Kindly provide us the link of the website with Framework/CMS detail. Also it will be great if you can tell us the flow of the work done. Would it be done on admin section after submission of something by user you want to set the price for that particular content, Is it so? Describe about the concept of the website. Once we have these details then only we can check with the issue & provide you the best possible quote for the work. You can reach me via skype: cis.brenda or mail me at brenda.cis40 ( at) gmail (dot) com.
Regards
Brenda