Actually there's no knowing what will happen to the value - and this also depends on how one defines "value" - the really clean $20 Nikkormat I bought recently has, for me, very high value at a price that wouldn't get you through a week's visits to charbucks. For me, it's not just that they make pictures although that's a big part of it. The high quality mechanical camera is somewhat like the railroad watch in that they are things which will never be made again in any significant quantity. So aside from the engineering and craftsmanship that went into producing them, they are truly relics of a bygone time.