Post war baseball is what I do for a living.
The crazy prices have knocked me for a loop. I don't have tons of high grade stuff, but more than my fair share of mid grade. Not sure if the $$$ can stay where they are, but I am of the belief that they aren't going to come back down to where they were. I have seen an increase in volume of sales and price realized even on mid grade 50's & 60's.
Here is the crazy part: HOfer & tougher cards always sell. Recently I have had more 50's & 60's commons sell. I think the higher price/visibility of the "ones everyone wants" has pulled some more casual collectors in the fold and they are purchasing what they can afford and WANT to collect.
Not everyone can put together a '52T Master Set but a midgrade '53T set is very doable.