Earlier quoted context omitted.
This squares with my belief that prices are currently way too high, for just about everything. Do any mainstream economists believe this?
High for everything, or are you talking about cars and real estate? Please provide an example. The products I see on Amazon are fairly cheap unless you are comparing it to products from CHINA.
I think /mostly/ the 'big ticket' items; anything with a cost over 1000 USD.
However the price of many other items are also quite high, particularly for infinitely replicate-able information (entertainment).
I'd argue that the price of many other things under about 10 USD is largely a land ownership or transportation cost; as a society we've become so effective at producing (even grown things) that the biggest issue is the price of energy and labor associated with managing those products to end users.