Lowes offers 10% off to just about anybody.
If you are a retired or active military veteran, show your card at Lowe's and get 10% off on your purchase.
Not in the military? Go to the Post Office and request a change-of-address kit. Inside you'll find a 10% off card, for purchases of $250 or more. Stop by the Post Office on the way to the store.
They also offer 10% or more off at the commercial desk (maybe 11% or so) and of course, 10% off if you open a "12 months same as cash" charge account, although I don't recommend it.
In fact, if you don't get 10% off your purchase at Lowes, check your pulse, you may be dead.
This begs the question: Why don't they just lower their prices and stop dicking around with these "discounts"?