You need:
A vcc with $1 or more on it
A Serial number for an Xbox One
A house/drop house

Instructions:
1. Go to xbox.com and sign into your account
2. Go to support.xbox.com
3. Click on Xbox one
4. Scroll to bottom and select repair
5. Click register a device
6. Enter your info and your serial number
7. Click request service
8. Select other then hit next on the bottom
9. Fill in all your information
10. Select xbox one advanced exchange
11. Hit next and enter your vcc
12. Your done you just got an xbox one