I ordered a backflow valve on line with there 20% coupon. All went well and order was accepted. I used my PayPal account to pay. Two hours later I received an email with an updated invoice alnong with an updated email from Paypal with a price change. Upon calling Zoro they told me they could not honor the 20%. No phone call or any communication of any kind, just a "here you go, up your butt" price change! Never again.