Don't forget that some of us refuse to pay retail, and often buy very nice lights at substantial discounts. Then knocking off $50 allows us to realize a nice profit on the transaction. Also, some guys buy stuff they can NOT afford in the first place, and when more desperate financial pressures crop up they MUST sell something to pay their bills. Or it could just be as innocent as becoming tired of the light, and wanting to clear off their shelf.
Don't over analyze it, jump in and take advantage of the good deal when you see it.
Paladin