Saw a recent post mentioning when RAM was priced at $1500 per MB.
That made me curious about the long term trend and I found the chart at this link: Memory Prices 1957 to 2013
Column 1 shows the date; column 2 shows the price in dollars per MB. Prices generally taken from retailers like Newegg.
Here's some conversions to dollars per GB, which is more easily understood considering the current price.
April 2014: 7.30 per GB.
Nov 2012: 3.70, all time low
April 2003: 76, first time below $100 per GB
Feb 1998: 910; first time below $1000 per GB
Aug 1996: 9060; first time below $10000 per GB
Mar 1990: 98,000; first time below $100,000 per GB
Jan 1985: 880,000; first time below $1M per GB
Oct 1979: 6.7M; first time below $10M per GB
April 1975: 67M; first time below $100M per GB
1960: $5.2 billion per GB