Quick test. What feels off or awkward in this form? Look especially at the price behavior and the price itself.
Did you notice the postcard price is missing? Is it really necessary to show when you're buying one or several postcards? That's why we cut it out.
Original version:
Theoretically, you could skip the per-postcard price. But logically it should still be somewhere on the product card, even if it's subtle. Let's shift the focus and find a middle ground between the first and second versions.
Here's to trimming and smart emphasis.
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Update: In case of a sale or discount, the old price will be struck through and the new one shown next to it. The discount emphasis stays.