TechPowerUp noticed that Newegg has leaked pricing details of an upcoming MSI-branded Radeon R9 290X reference card. The leak seems to suggest that the Radeon R9 290X will launch around $700:
On close inspection of the HTML code of the page, we discovered the pricing value intended for that page to be US $729.99 (excl. taxes). Given that Newegg.com tends to add $10 to $30 on MSRP, pricing of the R9 290X is likely to have been set at $699 (excl. taxes).