Design a Website Mockup

Website for exchanging goods and services with multiple products, will include users entry and compare products, option for choosing location for city. Will require database like sql. Option for authenticity via email foe llr the user who posts and for the user who wants to communicate to the desired user. option for various products catalogue. Option for searching results. Option for sign in using facebook and google account. Mobile site included. when user posts an object user should have option for adding options for place multiple exchange products. And after placing item user should get the matched items result if any previous user has put. Or consequently he should get maila on his email id for having new matched results just like any matrimony site.