responsive Osclass classified websites with store fronts

I already have a running classified website, i am looking to change a few things around and make it more sleek in the design and i am looking to incorporate a store front system where verified sellers can set up a store within the classified site. I am a web designer but i am busy with other projects now. I would also like to make this website responsive (which will be the major job here.) I am looking for someone skilled in php html and css and who has a good experience wit osclass or other classified website. PLEASE IF YOU DO KNOW HOW TO WORK WITH A CLASSIFIED WEBSITE JUST IGNORE THIS POST AND DON'T APPLY. The job to be done is minimal and would require a maximum of 1 day if u are an average php coder. After i have selected suitable candidates, i will show them the project for final phase of selection