It can be a really odd time when new product ships. The old "A" product is reduced immediately, but the "B" product often lags making for the unusually spectacle of the "A" product being less expensive than the "B". (A and B product is retail lingo for new and refurbished, respectively).
product that was sent back to the manufacturer because it was defective. They fixed it but can't sell it as new anymore. So they sell them discounted. The work and they have a warranty.