The new price is $350. It was originally $499. Microsoft really pushes its touch cover keyboard, so add another $120 to that price, and you're closer to the final tally.
Microsoft's
Microsoft doesn't reveal sales numbers, but in March, Bloomberg reported sales were just 1.5 million units since its launch in October. There's no reason to believe sales picked up after March.
For context, Apple 19.5 million iPads in the first quarter of the year.