If there's a $2 or $5 difference that's not a problem for most people.
My aftermarket PCV I bought was $45 on Amazon.
They have the EXACT same aftermarket part at ECS for $90.
See here:
https://www.ecstuning.com/Volkswagen-Golf_VI--2.0T/Engine/ES2681183/
That's a huge difference, plus shipping from Amazon is cheaper (free usually).
The only reason their oil filters are cheaper is due to the fact that they make up so much in shipping charges. That and if someone is buying a large enough bulk of them to get free shipping, they still make money, it's just a slimmer margin at that point.