Poor sales of my Graphicriver item.

Hi,

I’ve upload 10 days ago my item, and i haven’t jet any sale.
http://graphicriver.net/item/rollup-banner-mockup/15340604

If you could show me what is wrong with this item I’ll be very grateful.
For me it’s new experience, I never before sale my work via internet, and don’t show my portfolio online.

Thanks