I was thinking about this but be aware that Amazon Wireless has a stiff $250 penalty if you don't maintain the device on the same line of service for 181 days. Not a dealbreaker...just something to think about if there's a chance you'll want to switch devices within 6 months. I don't know what the level of enforcement is, but that's their stated policy.
Not sure if other folks are getting this too, but my Amazon order (existing line upgrade) supposedly includes a free car charger (first line item in the list below):
- [FREE GIFT] AmazonBasics Micro USB Universal Car Charger with Micro to Mini USB Adapter and Nokia Barrel Adapter
- Motorola DROID 4 4G Android Phone (Verizon Wireless)
- LTE 4G micro SIM Card Retail Packaging