I'm surprised a 94 has 5th gear popout. Does it also have the high-port (earlier) engine? If so, it's a super-early 94. The consensus is that Nissan solved the 5th-gear issue by the 93 model year, so I'd be wary of that.
The headliner is fixable. Nissan's paint from the 90s is junk, so that's no surprise.
I suppose if it's straight and rust-free (check the rockers, door hinge area, and under the core support) it might be a good candidate at the right price. $1800 is not the right price though.