Sorry, that's now how economics works.
You're assuming that since supply of the 60/60D is drained, that demand is going to go up. But demand would only go up at a fixed price on the 60/60D, not at a new higher price of $19k more as your example shows. With the new higher price, demand goes back down, so you'd have to reduce your price.
In any case, I don't see this changing the value [much? at all] of any 60/60D models. Once you drive it off the lot, you depreciated it a ton. Add to that the $7,500 fed tax credit and any applicable state tax credits. And when you go to sell it, you'll be getting pennies on the dollar.