I thought I'd compile a brief list of a few computer peripherals/components that sometimes inadvertently get scrapped when they could actually be sold for a quick buck. Of course prices can change depending on supply/demand. I have tried to approximate prices accordingly to how I have seen items be sold for in various places.
#1 Roland LAPC-I
$300 - $600
These are essentially a Roland MT-32 module on a single 8-bit ISA card. You can make them out by the two red RCA jacks on the right, and the abundance of Roland/BOSS chips. A lot of people seek these out for audio in games.
#2 Creative SoundBlaster CT5320
$500 - $1500
Rather uncommon soundcards that are used on the IBM MCA (microchannel architecture) bus. Used exclusively in the "Personal System/2" computers. I saw a new in box one sell for $1500. Nuts.
Note: there are a lot of other MCA soundcards-- MCA cards have the connector on the opposite side of PCI cards and generally have a blue tab. So if you see a card like this with audio jacks, it might not be a soundblaster CT5320, but it could still be worth a lot of money-- even more if it's a chipchat.
#3 Pentium Overdrive 180 Mhz w/ MMX
$60 - $120
The 180 Mhz Pentium Overdrive chips with MMX are not too common (they were never quite common to begin with). Some people still hunt them down for upgrading an older socket 5 system to more socket 7 capabilities and MMX.
If you pop off the fan they'll have "SL2FE" on the second last line above the intel copyright.
#4 3dfx voodoo 5500 (PCI/AGP)
$50 - $100
These are 3D graphics cards that can generally go for a bit. There seems to have been a huge saturation of these cards on ebay recently, however. They come in both AGP and PCI variants.
#5 IBM PS/2e (system type 9533)
$100 - $200
These are little tiny computers using IBM's SLC2 chips (386/486 compliant). Easily overlooked as they're so small. Ironically these were designed to be extremely recyclable and run on a (if I recall) 25 watt passive power supply.
#6 IBM PS/2 model 95 (system type 9595 or 9595A)
$100 - $300
For these it largely depends what's already in the system (i.e. HDDs, type of CPU complex etc). The best ones will have the "A" next to 9595 on their front badges, and the LCD screen will be on the RIGHT. The earlier ones will have their screen on the LEFT.
If you can find their P90 "complex cards", they'll easily fetch $100 - $200 in themselves:
#7 Roland MT-32
$50 - $100
Little Roland sound modules that can either be used with a Roland D-50 or hooked up to computers to generate sound/music.
They'll have "MT-32" blatantly on the front of the cases.
#8 Roland SC-88
$50 - $200
These are exclusively general midi modules. If you can find one that is 115V, you'll be lucky. Most being sold on ebay are for voltages outside north america.
#9 IBM ThinkPad 701C
$200 - $300
Value is increased depending on condition/peripherals. These are little oddball laptops that have their keyboards fold in as the lid is shut to compensate for their small size.
#10 IBM PalmTop PC110
$200 - $800
I've seen these go for extreme varying amounts. They're very, VERY tiny computers, could easily be mistaken as a toy. All came with a Japanese keyboard.
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Anyways, if anyone finds things like the above mentioned, it could always be worth taking a second look and listing that stuff.
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