Don't forget, SOME 318s have an M-Sport package.
They have a small //M on the side doors to prove authenticity.
Buuuuuut, in this case, it does sound fishy. We had a car like that come in, but it said M3. It was tricked out with bling rims and nasty rice tail lights. In reality, it was a 328i. I hate it when that comes in....posers.
I think that's what he's talking about.