Just recently got the extended warranty and maintenance after
shopping around, called up Classic BMW San Antonio and Penske BMW,
as well as my local dealer Little Rock BMW.
I would advise dealing directly with the finance manager essentially
dealing with all the paperwork and pricing.
7/100k Platinum Coverage on '07 335i Convertible with 41,297 Miles
Warranty - $3205
2 year/100k Maintenance Warranty - $2000
Total: $5300 + tax
Hope this helps for reference! Best advice is to shop around as many
dealerships as possible until you get what you want!
Feel free to PM me if you need help!