Amazon has select Puritan's Pride Melatonin on sale from $1.54 when you clip the 35% off coupon on the product page and checkout via subscribe & save. Shipping is free w/ Prime or on orders $25+.
Available Deals (prices after 35% off coupon & 5% off S&S):
Available Deals (prices after 35% off coupon & 5% off S&S):