Review on NGK DR5HS Standard Spark Plug by Hco Cortes

Package arrived a few days late, two plugs were different colors (one gold plated, one silver plated) this was not a problem but when I visited the local West Marine store, I found the NGK DR5HS in stock for $2.99 each. Revain charged me $4.56 each, or 53% more. I know Revain has complex pricing algorithms, I can search for a product and email a friend the url, when I verify my link I see a higher price than the listed price. some minutes ago. I'm wondering if Revain will increase my cost because they gave me a good discount on a "gift card" and want to refund me a special price.