Admin Area used to Post data on website

My client sells new & used printing presses. They need an admin area where they can enter the data and have it show on their website. Client Site is PastorePrint dot com. Once data is entered it should show in this page: pastoreprint dot com / [login to view URL] All fields you see must included along with photo option. Design of the website must stay as is. ------------------------------------ My client needs this just for that one page, pastoreprint dot com / printing-press-products.html. My client needs to be able to input data and have the product show on the page with details you see there. Also once the product has been sold they will need to delete the data or mark it sold. Also, we would like the leave the page created but after it is sold not show on the available product list. Thank you, Joe