It was recently on sale for $180, and I'm going to guess it'll be on sale again, since the Apple Watch is just starting to ship and new Android watches are expected to be announced around Google IO in late May. https://moto360.motorola.com/

Note: the heart rate monitors on these early devices aren't great! We have to do a lot of work to make sure the sensor works well and the graphs are understandable. But I think the hardware will improve rapidly in the next 6-18 months.