two prices in product detail

[marceff]

Is there any way to have displayed two different prices: 1 standard and 1 for a specific group of customers? There are customers who can buy points (credits) and then pay using that kind of payment. I'd like for them that their reserved price is shown in product detail. I have tried to add price but it doesn't display; then I create a child having it' own price but it doesn't display either. I am sure I have missed something but can't find what. I'd like that in product detail could be displayed:

credit purchase Euro 8 (or something similar)

Thanks for help