>I had one client that needed to upgrade an IBM PS/2 model 70 from 2 to 4MB (or maybe it was 1 to 2MB). That price made me gasp, $1,200 (1989)
>
>When I worked as an engineer in a manufacturing plant our LAN server was a Compaq Deskpro 386/16 running NetWare 286. That was $12,000 in about 1987. Because it supported the production line, per standing orders we had an identical cold spare in stores that never got used.
>
>Back in my CP/M hobbyist days I paid $200 for 64K of 200ns static RAM. That works out to $3,200 per MB (~ 1983).
>
>Dunno if you're seeing the same thing but RAM prices have gone up (at least in C$ terms) over the last 1 - 2 years. A couple of years ago I spent about C$95 for 16GB for my main dev workstation. Today, it's nearly double that.

not closely following prices any more, but if you compare the same type of memory (DDR-2 probably) as you think about adding more to the same machine, the main market shifted its sweet spot to DDR-3 so that might be part of it