About four or five years ago, ATF stupidly changed the reg about which Maxim plate is controlled, declaring the right plate the controlled part after many decades of the left plate being controlled. Prior to the change in regs, unregistered MG08s that had been "destroyed" prior to the change had the left plate removed and cut up. These kits show up now and then with the right plate intact and no left plate or parts of the left plate remainiing. Also, people with unregistered MG08s that don't know about the reg change, hear that the left plate needs to be destroyed, so they do that.
If you buy the kit and want it to comply with current regs, the right plate will have to be removed and cut into four pieces.
You don't say what you want to do with the parts, and you will have to decide if buying the remains of an 08 with the right plate constitutes a legal threat to you. In the big picture, a person having an unregistered right MG08 sideplate is of no interest to ATF unless you have attracted their attention for far, far more serious violations. FWIW