Reminds me of stocks. How do you tell if the price is at lowest? If it is not at it's lowest you are losing money. If it is at lowest and you didn't buy it you lose money too.
IMO, "price is at lowest" doesn't make sense at all. If I'm are interested in buying something, waiting for a while to save a few bucks would give me more pleasure than knowing what the lowest price of this product ever was.