The scammer swapped the serial number sticker behind the battery! If the phone wasn't inoperable, I could prove it. (How do I know? The sticker was off-center

The scammer swapped the serial number sticker behind the battery! If the phone wasn't inoperable, I could prove it. (How do I know? The sticker was off-center and poorly attached + the phone was missing some memorable scuff marks. Also, my phone worked.)