Current prices are so much lower than 2 years ago that memory purchases are way above 2 years ago.
A dozen years ago, I bought memory for $40 a megabyte,
feeling like royalty with 8 megabytes.
The amount of memory I put in my computers today, 2 gigabytes,
a dozen years ago would have cost
$80,000.
.
For the cost of 8 megabytes a dozen years ago,
I could now buy about 30 gigabytes DDR2.
If my motherboard could take 30 gigabytes and
if a 64-bit operating system would run all my software,
I would install 30 gigabytes of memory.
.
I don't buy more memory because my hardware and software will not accommodate more memory.
For me, the main issue is not the price of memory, but the ability of hardware and software to accommodate more memory.