can't buy it
well of course sales are lower than they'd like - you can't buy it in many places, including Canada. And even if you get one out of the US, you won't have 3G data speed, since the only model sold is only able to get high-speed data on the T-Mobile network. Google still hasn't released a version that will run on AT&T's network, or Rogers, Telus or Bell networks.
It's like Google is deliberately trying to fail.