Magento Layout & Code Customisation

Hi, I am looking for someone who is experienced in customising a magento website. We have already installed a magento theme, but we are looking for a design change and some code to be altered before the payment is taken in the magento framework. The budget for this is maximum $250 Our milestone payment agreement will be: $75 first milestone $75 second milestone $100 third and final milestone Please show any examples of your Magento work. Cheers Paul