You need to investigate the pinch weld, frame rails, trunk and underhood seam glues. Vin tags, body panels, check if parts have been off the car.
Here are some key points to inspect
gaps
Check frame rail & pinch weld
To protect the frame & pinch you raise the car using a soft pad
Most people don't know that and by the time you get the car after 20+ years its been damaged
from 2007 to 2014 You could get a stock 5-speed 95 S14 240sx for about $3200
The 1997-1998 Kouki were about $4500
Its hard to pay more for something you used to pay much less, so these days I Look for cars without engines that people have no use for.