I might have a slight hoarding problem with laundry detergent. However, I do love Purex and when I find it for $1.99 I will stock up.
Walgreens has Purex on sale for $2.99 if you use the $1.00 coupon in RP 3/3 insert you will pay $1.99 for a bottle of Purex.
You can order a 10 pack of clipped coupons for $1.50.
If Walgreens is sold out you can price match Walmart and still get this great deal.
I am not sure of CVS price but in my CVS ad the Purex is B1G1 so you may be able to get a better deal also.