I dont think so but it all depends on where you bought it from. But no usually they dont do that unless they have some sort of price drop guarantee like ive seen some companies have. For example if the price drops in less than 24 hours after you bought it you can get some money back.
Not so, the item was from a qualified competitor, not on sale and in stock. It was Amazon.com and they can trump anything by simply claiming that the cost is lower than their cost. I have no way to verify their cost so it's a great way to deny a claim.