I am always on the lookout for deals on polish, and there are a couple of different ones going on. Depending on where you are located, hopefully one of these is in your area.
CVS has a great deal on Revlon Nail Polish. They are $4.99 a bottle and you can get a $3.00 Extra Care Buck on each of them...up to 6 bottles. So, in reality, they are $1.99 each after the savings.
CVS also has a deal on Sally Hansen. Spend $10.00 on Sally Hansen products, and get a $3.00 Extra Care Buck back. Great deal!
Lastly, L'Oreal has a buy $15.00 and get a $5.00 Extra Care Buck back...nail polish is included!!
Walgreens has Sinfulcolors nail polish on sale for 99 cents. I haven't tried this one before, but for the price, it might be a great deal.
I am certainly hitting the Walgreens deal and the Revlon deal at CVS. Not like I NEED more polish, but it can't hurt to get more :)