Monday: 20% off most things at Monoprice w/coupon

The internet has decided that today is Green Monday [a good opportunity to recycle things that are not in use or not in need?], and the Monoprice website is offering 20% off almost everything using coupon code GM2018 [as in Green Monday 2018]. Exclusions and restrictions apply as usual. You can test the coupon by adding the items of interest in your shopping cart and entering the coupon. If there’s another coupon in the shopping cart, you must remove it first. You can test the coupon without logging in or creating a Monoprice account.