Check out the examples i have included that shows you what i like the most. I like the 100% quaranteed symbol of 99design as well.
Erzählen Sie uns, wer Sie sind und wen Sie erreichen wollen?
The target will be people who come to compare prices for lots of many different products.
I was thinking myself to have the word "preis" (Price) and then the number 1 in a round circle above the word. But thats a idea of mine and since im not so creative i will leave that up to you. Only requirement it should have is that it can be easy to read and the coloring should be liked by each person.