recent listing

I want to add on the listing card of [www.rosariobiz.com] homepage, below the rating stars, data e.g. 30% off, or certain discount or amount. As it is in [doiser.com], check the middle of this homepage.
I want to offer a B2B website, where suppliers can post discounts or deals, but without selling them as a groupon o cupon. The website service is only to get in contact between the supplier and a potential buyer.
Is it possible to add this information on the template?

Thanks!

The page I need help with: [log in to see the link]