Best place to get the HTC one for Sprint.

Will be upgrading via NewEgg or Wirefly and then sending in my EVO 3D to HTC for hte $100 gift card. I doubt you can sell an EVO 3D and its accessories for more than $100 on eBay or Craigslist nowadays.
 
I use Best Buy specifically for their insurance. They take your phone and get you a refirb in twoish days. It's really nice. I've been really happy with the service on my EVO.