Does anyone know the actual quality of these filters you can find on eBay and a couple other sites?

 

How do they compare to other popular brands?

I just got one from my local Nissan dealer parts department. Part number, A5208-43G0A-01. It was fully plastic wrapped, and quality looks good visually.

Zcardepot buys them from Nissan, likely wholesale, then sells them on eBay and still makes some profit. 

At least their shipping rates are better on eBay than their own site. 

I also just buy them at my local dealer. no shipping just a short drive.