That looks like a very old computer with a very old motherboard. Would likely be more of a curse than a blessing to someone, even if they needed one badly. Probably uses an IDE hard drive, which are becoming nearly impossible to buy new for a reasonable amount of money.
If the original drive is still in there, it's likely well past the five or so years you can reasonably expect it to perform before it slows to an absolute crawl and then dies.
I don't think the "fix or throw away" analogy between PCs and firearms really holds up - sure, scandisk, defrag and reinstalling an OS can deal with file table errors (logical errors) for a while, there are underlying physical wear and tear issues that no user can fix, short of having some very expensive tools and a clean room.
To keep just about any wood and blued steel firearm going indefinitely, you just need springs, solvents, oil, sandpaper and some other miscellaneous tools and chemicals that are probably not too different than what you'd use 100 years ago to keep a gun working.