So what? They simply weren't aware of the discrepancy. If the VIN tag does not match the con VIN, registering it in another state may be a problem. If the con VIN comes up stolen, buyer could lose the car and the money.
This is displayed at the bottom of the description for all cars consigned to B-J AZ.
VIN NOTICE: DEPENDING ON THE STATE OF REGISTRATION OF THE BUYER, THE VEHICLE MAY REQUIRE AN INSPECTION AND BE SUBJECT TO A STATE-ISSUED VIN AND/OR OTHER REQUIREMENTS OF THAT STATE.