I just checked and it is quoting $77 for two years for a G1 type phone. Not seeing any parameter that suggests $50 for an N900 type phone for three years- was that a deal only through Amazon?

Update- Yep. MUCH better deals through Amazon. Best I could find though was three years for $64 for $400 or less phones.

Still way better than the G1 quote on their direct site.