On Tue, 23 Sep 1997, Kai Kaltenbach wrote:
[...]
  Actual IBM CGA cards
are a must-keep.
 
Hercules and MDA mono cards 
    Original Hercules brand cards (as opposed to
compatible) and IBM
 Monochrome Display Adapter cards are also must-keeps.
 
Generic XT floppy controllers 
    Genuine IBM floppy controllers should be
saved. 
 
IMHO _all_ genuine IBM cards should be saved. I always dig through the
'any card 1 pound' box at radio rallies (hamfests) looking for such
things. IBM cards have the advantage that they can be repaired (I have an
almost-complete set of TechRefs).
IMHO collectors will want early genuine IBM PC bits in the future. Just
like some people will pay for Altair bits today.
There are a few IBM cards that I've never seen and would love to get. Top
of my list is a PGC (professional graphics controller) - a 2 board set
that contained an 8088-based graphics accellerator. It emulated a CGA card
(I think) but had extra modes as well. Another thing I would like is a
Data Aquisition and Control adapter.
 Kai 
-tony