I use Callcentric to give US phone numbers + SIP numbers to Android phones I use as testing devices, and $0 beats $2 + $1:

http://www.callcentric.com/dids/free_phone_number

No affiliation, just the cheapest legit company offering a local phone number + SIP I've found that "just works" with Android Nexus phones as well as iOS apps like Bria or Groundwire.

The free numbers are for NY, you can also try http://www.callcentric.com/dids/phone_number_sale to see if there's a $2.95/month number local to you. Not that it matters for SIP.