Looking for Graphic Designer to Editing Product Pics Professionally.

We are a online bazaar where we need to editing our product pictures into professionally picture. Therefore we are looking for graphic designers who can work with us on a long term basis.? $0$0$0$0We will always have requirement for pictures to be edited and we will paid once the designer had done 20 pictures or on a weekly basic.? $0$0$0$0$0The requirement is simple for the picture editing such as changing the background, making the pictures sharp and adding watermark to it. It must be able to blend with my website.$0$0$0$0$0Please qoute us based on 20 Pics per assignment. Thank you.$0