Deals on 335i and 328i

[SilverBullet]

I went to the BMW dealership today to test drive and work out some numbers on cars I was interested in. On a 328i that I test drove, on a 36 month lease with 12k miles per year, they offered me 0 down with $564 per month. The msrp on the car was $37k, it only had the premium package. On the 335i, which was priced at $48k, they offered me 0 down and $725 per month. The 335i had everything but nav. For a trade in, they offered me $19,500 for my X, which I told them that if I gave it up for $23k, it was a steal for them. I want to know what you guys think about these deals. I personally think that they are very high. Any suggestions, advice? Thanks.