Check out this PrestaShop blog post for interesting tidbits such as:
Increase value for the same price
Believe it or not, consumers prefer to get more for the same price than to get a discount on the product. This is why you often see “33% more” on hygiene and food products. Psychologically, the 33% more for free sounds better than a 33% discount off the products price.
here.
A typographic, designological, visulicious extravaganza!