lower price guarantee is only on the site you bought from. Tthe Norton page "The Lowest Price Guarantee allows you to make a claim, if within the 30-day validity period, you see the exact same product advertised on the same merchant's Web site at a lower published retail price. If the claim is confirmed in your (the buyer's) favor, we will refund you the difference up to $100 USD". nortonshoppingguarantee.com/shoppers/terms-and-conditions/

Earl, Norton guarantees a lower price on the site you purchased from not from other sites. That is a price match request for other sites.

Earl, the Norton guarantee give you price protection for a 30 day period. If you find a lower price within 30 days of purchase, you can apply to be refunded the difference.