Hi, I printed the Buckley's $4 off coupon from Facebook. Today, I went to a Shopper's Drug Mart to buy some Buckley's liquid gel and try to use the coupon. The cashier went and ask the manager if the coupon was valid. The cashier later told me that the coupon was invalid because it was not in color. I was like WTF, it is an internet coupon, my printer doesn't print in color. Was anyone able to use the coupon? I heard ads about the Buckley's coupon on the radio as well.