memory upgrade

[0000-Admin at UCBVAX.BERKELEY.EDU]

We have a PI and are interested in buying more memory.  Unfortunately,
our potential budget for this upgrade is not very large.  So there are
two obvious questions: 1) How much do useable 4meg. SIMMS cost?
2) Does anyone who has upgraded to 4meg. SIMMS have leftover 1meg.
chips that I might be able to take off your hands for a small fee?
Curious (and interested in buying...),
Eugene Gholz
(eugholz at poly1.nist.gov)
(root at uzi.mit.edu)