Head to Walgreens and check if they have CoverGirl mini nail polishes on clearance. The Walgreens on N 14th in Lincoln, NE did and I bought 12 for $4.98 including tax. They are marked down to $1.79. Use the $3/2 CoverGirl products coupon in the 3/2 P&G Sunday insert to bring them down to $0.29 each. Luckily, I had 6 coupons which I used on 12 polishes. These make great gifts!
Not all Walgreens have the same clearance items so don't hate me if yours doesn't have these in stock! Thanks to Krazy Coupon Lady for the heads up on this deal.