1. The Rebate GameRebates offer opportunities for big savings, but you have to look for them. Companies use rebates when a product will soon be discontinued, to cut down on excess inventory, or as an inducement for buyers to get into a camera system. They can be the mail-in type, but these are being supplanted by the instant rebate (especially at online retail sites), by which the buyer gets the rebate on the spot. Instant rebates are less unwieldy than mail-ins, which are administered by third-party fulfillment companies.