If you are planning to by an item from a company on line, go through the process of buying it right through to the checkout then stop and close the website down. You will be amazed how many sellers ( who assume you have changed your mind ) get back to you within 24 hours offering you a price reduction or some special deal. Trust me it works.
Except with airlines who put their prices up. Always clear you cookes or use a different browser/private browsing if you are returning to a travel website.