Good deal at $100 since it includes fenders, an older pair of ortlieb bags (those things are tough), and the bike has schwalbe marathon tires (they are tough and long lasting).
Does the bike fit?
It does have a u brake which is a mixed bag. It's actually fine if riding road/gravel but not fine if riding off road.
With a u brake, this is likely a late 80s bike and the geometry may be good for a drop bar conversion. By the 90s, MTBs typically got longer in the top tube wheareas in the 80s, they tended to be not as long. That's just a rule of thumb obviously.
But it will not be difficult to do a drop bar conversion. Alternatively you could just run a trekking bar which sort of looks like a drop bar squished flat. This is easy peasy and cheap because the existing shifters and brake levers will fit. It provides excellent hand choices.
This is my '92 Trek 950 with a trekking bar:
