I see prices all over the place on Amazon and local auto parts stores
not sure if the low prices on Amazon are original parts
where are you getting your parts from?

 

You need to be careful with Amazon. Sometimes they deliver parts not made in the USA.
Look for sites that sell OEM, Motorcraft parts.

There are some quality aftermarket parts suppliers out there, the object is to know which ones.
Many times inferior quality parts look good , but quality control was absent.