I usually don't like to speak about others business style. But, there would be no reason for a part from fastlane not fitting. What kinda cra* is that. I purchase from the same source as fastlane and the pumps will be Bosch pumps just like MB would sell.
AND the current MB list is $264. He is really giving you a deal.
I have no problem with a business selling at any price they choose, but lieing about it, I have a problem with.
Bosch Master, ASE Master, L1
33 years MB technician