Due to high demand for these cards from cryptocurrency miners like Litecoin, the going rate is much higher than what AMD had in mind when they launched the cards late last year. The Radeon R9 290X for instance has a $549 MSRP but the cheapest available card is the VisionTek Radeon R9 290X for $599.99, with all other alternatives costing anywhere from $611.31 to $699.99.
The Radeon R9 290 is in an even worse spot, this card was supposed to retail for $399 but the cheapest card The Tech Report could find was a PowerColor unit priced at $539.99! The R9 280X is in a similar spot, this card will cost you at least $100 more than its $299 MSRP.