Guess we'll agree to disagree here, Brendan.Actually expect the prices to GO UP!!!! all those who were dumping Pentax, are now going to jump back in and buy stuff, watch our cameras and lenses increase in value and ebay a sellers paradise for Pentax items.
If you owned a camera shop and everyone was coming in to trade-in their film based Pentax =bodies= for the digital SLR you would have quite a supply of used Pentax film bodies that are not moving. If that happens, you would offer less for the bodies as a trade-in and also, because of this, lower the price on them as they are not selling.
Please note I'm talking =bodies=, not lenses. I will agree that the Pentax used lens market will go up.
-- Later, Gary

