1- USE local second hands websites. Some persons take photos where is visible the IMEI on the box.
2- contAct the vendor and tell him that you are interested and you need to know if is porchased directly to Google Store.
3- Ask them to send an email to you to continue the deal, probably that’s the same email that is linked with the Imei.
4- you can start to CHat with Google and they will ask you for email linked... paaaaaam!
5- you will get your Label!
6- not working?
7- Contact the seller again and ask directly for order number for verify the warranty because you are interested on it.
8- Is not so easy as first... but still possible get Labels!!