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I wonder where they obtained that from originally?
BTW, I think you meant hardware, not software. Updated the thread title for you.
Looks like a great deal to me. Not too expensive and considering those aren't super common, it seems like an acceptable price (assuming the shipping is also acceptable).
You will be able to sell it to a collector if they need it later, so I suggest you buy this now (obviously assuming you have the spare cash). You can't do much nowadays, but as a collector's machine, it seems great.
What some people might not realize is that the Compaq deskpro 386-16 was the first desktop PC 386 system. They even beat IBM.
Compaq was acquired by Hewlett-Packard in 2002, the brand name was retired by HP in 2013.
Even though this is not strictly "IBM PC" related, an Apple Lisa 2 is currently going for the low, low price of $250.00.