Website in Yii framework - small maketplace

Website where users and sellers will be able to register themselves and create their account. Users will be able to search for offers under various categories and sub categories and supplier will be able to post products. Users will be able to purchase the offer. Supplier can share his offer on social networking website like - Face Book, Twitter... Users will be able to make payment through PayPal gateway, integrated over the site LIKE [login to view URL] - PLEASE have a look at that Site first. The functions of the frontend and of the backend will be very similar like [login to view URL] and peopleperhour.com. There will be a geosearch-"nearby search" incl. The Website should be compatible with smart phones. Yii framework and bootstrap, please advice? I will send you the [login to view URL] for an overview after you have requested for it. The design will be done during the time of the developing by us. For the beginning you will have the layout.psd. Here are similar Sites: [login to view URL] [login to view URL] / this side is made in yii framework For any questions, please do not hesitate to contact me.