According to http://smithsonianchips.si.edu/augarten/p64.htm "In 1981, they slashed the cost of 64K RAMs from some $25 each to about $5, and the price hovered at that level throughout the following year."
This was a surprise to me; the Commodore 64 cost $595 on introduction in 1982, and answers to When did 64K RAM become about as cheap as 16K? basically discuss 64K becoming cheap in the 1982-84 timeframe. Ads in the back of Byte support my previous impression e.g. December 1982 doesn't even list a price for the 64k chips, just "Call" which suggests they are still scarce and expensive.
Is the above quote inaccurate? Or is it that the wholesale price of 64k chips did indeed fall to $5 in 1981, but for some reason it took a couple of years for this to filter through to consumers? If the latter, why?