Local Lowe's here sells 1/2" X 10' M copper pipe for 16.58$ and 1/2" X 10' L for 11.63$. Been this way for a while . Menards , Home Depot, Ace Hardware ,wholesale houses all charge more for L . I think it's a snafu way up the line . Bring it up to management and they tell me the same thing . Price is what the price is. How can they sell L for less ? Never seen that in my life . Half tempted to notify Attorney General of price gouging.