This week at CVS there is  Buy 1 Get 1 Free promotion on select Nature’s Bounty products.  Here’s the best deal we found:

Buy 2 Nature’s Bounty Vitamin D, 100 ct. $4.99
Buy One Get One Free
Use 2 $1.00/1 – Nature's Bounty Vitamin – (bricks.coupons.com)

Final Price: $1.50 each when you buy 2