PCV Price Difference

I just bought my 02 Rodeo V6 not long ago, and I went to order/buy a pcv valve and was kind of confused....Why do Autozone, Napa, etc. list the PCV valve for $4, and yet the dealer quoted me at $15. I think I have a screw in of some sort (honestly haven't looked at it yet). What is the deal with these? Can somebody shed some light on this for me...

Dealer markup. I just installed a clutch cable on my Jetta. $28 online, $75 from the dealer!

Ford F150 drivers side power mirror $50 new oem replacment already painted
$214 dealer not painted

i'm aware of the dealer markup, just thought maybe i needed a special type of pcv that autozone didn't realize...thanks

St. charles is like 12 bucks. It is not a screw in.

..It is not a screw in.

Hmmmm. It is a screw in type on my 2002 3.2L. I'd use caution with aftermarket PCV valves on these particular engines- being as sensative as they are. The OEM units seem to be put together well. I took mine out & cleaned it with intake cleaner @ around 20K miles. You should be able to suck air thru it, but not blow air thru it ( :evillol: :disappoin ). They are prolly good for 40-50K miles if you keep them clean.
G/luck
Joel