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What are the top 10 rarest vintage computer bits you own?


Experienced Member
Jul 4, 2007

I have a few vintage S-100 boards;

The harder are the Processor Technology boards for building an Altair 8800 SubSystemB;
I have the Processor Technology CUTS board (UnTested) and I'm looking for a GPM board and a 3P+S board complete a SubSystem B build.

Compupro VIASYN SPIO (Not Tested) (I wish I could find documentation to see if it works.)

These I want to trade off for stuff I need:
Vandenberg Data Products 16K Static RAM Tested Working
DynaByte 16K Static RAM Tested Working
IMSAI RAM-4A Rev2 Static RAM (Needs help)
Jade Computer Products Serial/Parallel Interrupt board (UnTested)
Compupro VIASYN SPIO (Not Tested) (I wish I could find documentation to see if it works.)
XITEX Dallaw SCT-100 Composite Video (Not Tested)
ITHICA Audio IA-1100 Composite Video (Not Tested)
2x ADS PROM Blasters (Not Tested)
TeleTek SBC-1 CPU board (Not Tested)
MITS 88-S4K (Bare Board)

I'd like to get ... in the order of importance:
Processor Technology GPM board
Processor Technology 3P+S board

Solid State Music SSM-IO4 board
CompuPro Vector Godbout RAM17 board
Solid State Music SSM-IO2 board

wperko at brainless org


Experienced Member
Jun 20, 2016
Shokan, New York
Most of what I have is not rare. But if I look at some of the oldest stuff I have, it's this:

NorthStar Advantage (Z80 CP/M)
Atari 800 Home Computer
Commodore 64 Home Computer
Tandy CoCo2 Color Computer
Apple IIe

Tandy 1000HD (8088)
Tandy 1400FD (8088/V20)
Packard Bell VX88 (8088/V20)
IBM 5162 XT-286 (80286)

I owned a NorthStar Horizon back in 1987 but I sold it. I wasn't collecting computers then and I was better at using the Advantage so I didn't need it. I wish I had kept it.



Experienced Member
Dec 8, 2012
Las Vegas NV
The rarest vintage computer I have is a TRS Model 1 Rom 1 with the original 4K of memory with Tandy Monitor aka TV Set. From around 1977 I believe. Has not been modified. You can type in programs for Rom 1 Basic or attach a Tape Drive and use it to load/store progames. Also have the original manuals. It was discovered in Ohio by a buyer/seller of Storage Lockers and had been there uncovered for several decades. It's in really good shape for its age.


Experienced Member
Feb 1, 2021
The Only thing I have that is Hard to find rare is my Complete in Box Windows 1.0 and My Redneck Rampage Deer Hunting from interplay.


Veteran Member
Jan 30, 2012
Connecticut, USA
Been following this post for a long time not sure if I ever posted. Who is to say what is rare? In my opinion these are my rare items in somwhat order of rarity:

A 1971 Wang 700 (only thing I own with core memory) with matching Wang modified selectric typewriter/printer
(just added) Cromemco System 1 with 512KB RAM and z80/68000 dual cpu board
An MAI BASIC 4 mini computer with portrait mode CRT terminal and wide format daisy wheel printer (MAI branded)
IBM 5110 Model 3
Fully functional Apple /// system (upgraded with APPLE III PLUS+ mainboard)
2 X 1977 Commodore PET 2001-8 systems with chiclet keyboards and 6550 RAM (one with a blue crt bezel one with black bezel)
Commodore model 8050 dual floppy drive
ACTRIX Matrix CP/M Luggable
two Apple IIc Plus systems
(related) a Zip chip 8000 (8mhz)and Zip chip 4000 (4mhz) 6502 architechture cpu accelerators
8 bit ISA 386 16mhz upgrade overdrive board with 2x 4mb ram upgrade daughter cards
TRS-80 model II
TRS-80 model 4D
Apple Lisa 2 (with working 5mb profile hard drive)
Macintosh 128K
Motorola and Daystar Macintosh clones
Working TRS-80 model 2000
Kaypro2000 laptop

Im sure I have more that I just cant remember but those are what spike my interest/memory
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Experienced Member
Feb 3, 2017
Southeastern US
Fully working CMI-6426S with zero bad sectors, does that count? I also own a Seagate ST-406 (working with bad blocks) and a Cogito CG-912 (responding but bad surface 0), of which I've seen very few. I think the next thing would probably be my PowerBook G3 Kanga with the max 192MB of RAM.

I also have a bunch of weirdo expansion cards, like a Rockwell PCI internally bonded ISDN modem and some Ubiquiti military miniPCI wireless radios with wildly illegal transmit power ratings.
I have a 1959 Philco Predicta Debutante (Chassis 10U43), too, if that counts.

A lot of my things are one of a kind but utterly valueless!


Aug 31, 2011
Pittsburgh, PA
I completely understand the idea of something being unique but valueless - it's at least valuable to me! Here are some of my rarer boxes. I've tried to focus on the gear I have not seen in other collections:

1. Resilient 110 - a fault tolerant SPARC server with 3 Sparcstation 5 compatible workstations running in triplicate
2. nCube server, a massively parallel media server which previously ran an exhibit at Epcot Center
3. Clipper coprocessor board - essentially an Intergraph workstation on a card
4. SGI set top box - an SGI INDY packaged as a set top box with custom audio/visual hardware for doing streaming, part of a demo in Florida in the 1990s
5. Motorola VME/10 - early Motorola desktop computer using the VME bus
6. SGI Virtu VS100 - essentially a BOXX workstation in SGI clothes, pretty boring but uncommon
7. Cisco MSM - the mid-range C-bus router reconfigured as a terminal server
8. SiCortex SC072 - multiprocessor development system with 72 cores
9. Orion Multisystems - desktop cluster using Transmeta processors
10. Sherpa APA6670 control box - a custom built multibus computer made by IBM Research Division as a print server; mine came from CMU

Here are some more common but still cool items:
1. Xerox Daybreak workstation
2. SGI Prism
3. Sage II, runs p-System
4. Onxy C8002 (Z8000 based)
5. IBM PS/2 model 70 486