With deals like these going on for new vehicles, I wouldn't touch that loaner.
My buddy bought a former service loaner and it had 8K miles on it. His cars sticker was $63K and he got it for $52K but it did have a set of M wheels worth about $4.5K.
My take on loaner cars is...buying a loaner car, is like marrying a former hooker. You know its had miles and a lot of different drivers/riders. The history will always be there.