Design & Develop a Magento Online Multi-Vendor Marketplace

This project is to design and develop an online multi-vendor market place from start to finish, incorporating PayPal Adaptive payments and payment gateway such as SagePay. Possibly using this extension [login to view URL] Have you had experience of using this extension? Please see the attached document for a list of features that we require. The website is to be launched to the public in August 2015 but we would expect our sellers to have access to upload their products by May 2015. In the price you bid I would require technical support / bug fixes for 12 months after launch. In your bid please can you include a links to any other marketplace portfolio websites and contact details of at lest 3 references that I will be able to check. Before I choose a bidder I would require a full detailed proposal from you. That can be carried out after you have placed your bid and we have spoke to each other about the details. If you need any clarification then do not hesitate to contact me.