You either need to flash a Rogers firmware file or run a full sense RUU (International/Dev/etc) I am suspecting thats where the boot screen is showing up from. Keep the phone S-OFF to guard yourself from any issues that may arise. Your buyer wont care, or may even be pleased.
There's no full sense RUU for Rogers - or at least that I've found. I flashed a stock Rogers nandroid, and I can get OTA updates. Turns out recovery is borked - I flashed a recovery file for a HBOOT 1.54. Would that be the issue?
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.56.0000
(bootloader) version-baseband: 4A.23.3263.28
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.19.631.9
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) serialno: *redacted
(bootloader) imei: *redacted
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0712000
(bootloader) cidnum: ROGER001
(bootloader) battery-status: good
(bootloader) battery-voltage: 3911mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-4dab9d12
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0