Welcome dalbe420,
You came from the best resource for your issues: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support
Did you follow the steps in 'Remove your personal information from your old device' here?
You mentioned receiving error 7005. What steps prevents you from moving forward? Are you getting this error when you attempt to remove the device from your account? Or are you trying to restore to factory settings? If so, are you using a computer?
Hoping to hear back, take care.