Well, comparing to prices here, ~$45 is cheap, but then that's a pretty low spec computer, even comparing with 2006 standards (except for the RAM/HDD).  Judging the price of old hardware thus can be difficult, but I think it's somewhat in the range of Pentium 4/D machines, so probably pretty decent at least, if not good.
If anything, 2GB DDR2 RAM is actually probably worth the amount alone (edit: 2GB DDR2 selling for $30 here, so not too far off), as well as the case if they were new.

(This post was last modified: 13/01/2012 10:11 PM by ZiNgA BuRgA.)