If you're gonna sell only 5000 cards at launch you can price it whatever you want. Your losses or gains won't be incredibly high. And then you can continue mass production when yields have improved.

Say Nvidia prices the cards $200 lower than necessary to break even with production costs. What does it cost them at this stage (if the 5000 cards rumor is correct of course)? 1 million dollars. That's a lolzor amount for Nvidia.