Why the f*ck would you want to buy that? It's old as shit technology, and probably on the verge of breaking. Do yourself a favor and buy a much more recent bike.
everyone is right, don't buy it. the geometry on it is going to be way different then todays modern bikes (in a negative way), its going to weigh a metric ton, and its so old its probably won't last long.
I think if you can get him down to a low enough price then its worth it as everything has its right price, parts don't look great and everyone is right saying they will be outdated.
could buy it if its cheap enough then just upgrade the parts when they break
probably much better deals for second hand bikes out there though.