Yeah, $1.50 less at Amazon. Or, if you buy 4 at AAP, use a $20 off 50 code, or combine with another order, they can be had for ~$8.50 each.
They are good for ~15k, so to get your monies worth, best with extended or two oci's. Also cheaper when included with an oil and filter promo at AAP. I got my three with an oil/filter promo, and an AAP 'glitch' for ~$4.50, otherwise I would have just purchased a P1.
Running a 3323 now for the second of two 10-15% MM (12-13k) ocis in an Accord.