I am used to working in an agile way so I would work with the buyer in closely in order to make sure I deliver the desired end product.
I would provide them with the following end product:
1. A HTML5 & CSS3 Website
2. A future proof Website
3. A fast and Responsive Website
4. JQuery sliders/slideshows or LightBox elements
5. A Website that can deliver quality no matter what device its viewed on.