Here's how to get anything ($3 or under, this week only) free at CVS:
Get 12 Sally Hansen nail polishes (or 15, or 30, as long as you have enough coupons to cover it doesn't matter)
Get any item around $3 (I needed hair ties) - make sure the total is $15 or over
Use $3/15 CVS coupon
Use 4 $3/2 Sally Hansen nail polishes
Pay sales tax on everything!