I purchased the Platinum extended warranty 7/100 for $3,600 including tax, and the extended maintenance plan for $1,895, so $5,495 out the door. My car is a 2007 335i coupe with about 47,000 miles on it.
I purchased from Henry Hall at Santa Monica BMW. I think it is a pretty decent deal, espcially compared to the outrageous quotes the local Vegas dealerships were providing! Hope this helps...
2007 335i Coupe - Jet Black / Coral Red / Aluminum Trim / 6MT / Sport / Premium / CA / Navi / iPod + USB