Last year's flea market was the year of the cheap
486 (66mhz and below)
and '030 Mac (lots of IIsi and IIci CPUs, often with net cards and
40 or 80mb drives, for $25). You can sort of judge the strata of
"obsolescence" by what is common in a particular year; though you will
see older, it seems to be few and far between.
I suspect that this will be the year of the low-end Pentium (75-100) and
(I hope) the '040 Macintosh. (I'd like to find a cheap Quadra.) There
Please report back on what you find, but it seems to me prices bottomed out
last summer during a massive dumping of 4 to 8 year old machines, and since
then prices have come back up to more like $40 for a low end 486 without
monitor etc. I would not expect to see a Quadra for less than about $75 for
a Q610 or Q700, but the little IIsi is still under priced at $25 for a 5/80
IMHO.