Rear Main Seal
 

I just had my 2007 Boxster S, with 40,000 in to the dealer for service. Plugs, air filters, brake pads. They also told me that the "Rear Main Seal and Intermediate Shaft seals are starting to leak oil" and need replaced for $2,200. I do not see any oil spots in my driveway. Is this needed and is that a fair price?