This is what I got from the seller...... Seems like a load of BS?? He claimed in the EBay listing that his source for this device was "Overstocks from Google. Excellent Condition. OPEN BOX"
Thank you for contacting us. The phone is carrier unlocked.
Please do note that eBay does not require Pixel devices sold to be firmware/bootloader unlocked, and only requires the device to be carrier unlocked, and works for all carriers (which this device is indeed is). There is a difference between carrier unlocked and Bootloader/firmware unlocked, you can only get bootloader unlocked directly from Google, please see link: https://android.stackexchange.com/questions/44782/unlocked-device-vs-unlocked-bootloader