Target has 12-Pack PUR Water Pitcher Replacement Filters (add 2x 6-packs to cart) for $44.98 (price reflected in cart). Shipping is free, otherwise free store pickup is available if stock permits. Thanks confusedpal
Note, pickup availability may vary by store.
Editor's Notes & Price Research
A Target REDcard entitles you to 5% off most items, free shipping for online orders, and an extended return period. - johnny_miller
Link to 6-Pack Water Filters (Buy 2 so 12 total filters for $45 or $3.75 Each)
Other PUR Water filter products are also Buy 1 Get 1 50% at Target.
EDIT (Alternate Deal):
If the two 6-packs are no longer in stock for you, you can order 2 of the following 3-packs with the 5% off Subscription option for $22.78 so it comes out to be $3.79 each. Only 4 cents more each than the original deal.
Link to 3-Pack PUR Water Filters (Buy 2 w/ Subscription so 6 total filters for $22.78 or $3.79 Each)