Since most of the OPI polishes are $8.50, it comes out to buy 2 get 1 free. Don't forget to print out their $3.50 off of a $10 purchase, to bring down your total to $13.50 for three OPI polishes. You'll be paying $4.50 a bottle.
I went in today and bought That's Berry Daring, No Room For The Blues, and got The Flowers Are Blue-Ming for free.
Hope your able to take advantage of this great deal!