Hi Nicolas,
You wrote:
"So far, no one could explain to us why it would be useful to have a retail price in a product and not display it on the product page.
So we still don't see any reason why we should add an option for that.
Could you provide more information on that ? "
Well, I can give you a good reason: we sell at retail prices! Except for a group of logged-in customers who have a lower price.
As soon as those customer are logged in, it's OK. The see: Common price: 8,95 € Your price 7.40 €.
But before logging in, AND the other, 'regular' customers, see: Common price: 8,95 € Your price 8,95 € !
That's a bit silly and suggests they do not get the best deal.
So IMHO there should be ab option, or even always, hide it when the prices are equal.