Michael,mhampson said:
Welcome to the forum. I can answer the following. Yes there is a metal stamp that will have the cavallino horse and the SN of the car. If Dirk see's this lets hope he'll post a photo (hint, hint).
There are two members which have bought a 308 recently. One from Washington state and I think he paid near this same price. There is also Dane that recently sold his blue 308. I'm not sure how much he got. I know that given the color this could reflect aprox $500 difference (not much). Of course this is a little high on the mileage which will reflect the price. Overall I think not a bad price.
As everyone will suggest, ask the sales person if you can have it checked by an independent mechanic.