[user5994461]

Cards in French retailers are 20 to 40% more expensive than the American retailers.

They are constantly sold out as well. From my experience, there are only the overclocked/premium editions left and they charge a lot more than the RSP.

[BLanen]

20% is because of VAT, so you have to discount that from comparisons.

[user5994461]

Consumers have to pay it. No, this can't be discounted from comparisons.

The $500 card becomes > €600 because of adding the VAT and skipping the exchange rate.