With orders of $25 or more, Amazon offers Prime members the Vidal Sassoon Pro Series London Luxe Hair Color Kit
in Dark Royal Chestnut for $2.32. Clip the $2 off
coupon on the product page and check out to cut the price to free
. Plus, Prime members bag free shipping
. (Non-members can spend $35 to qualify for free shipping.) That's $7 below what you would pay in-store locally for any color.
Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.