I'm new to the whole rx7 scene and am about to go looking for a fcouple ND was wondering is there any certain spots I should check for rust? I know the usual rocker panels and obvious rear quarters but certain cars have their spots.

 

If the hatch trim or sunroof trim are broken (usually at the back of the sunroof in the middle, or the bottom of the hatch in the middle), there is a chance they will rust.

Also check the bottom of the doors.

 

Awesome.

 

Common FC rust areas in my experience:
-rear of front wheel well at rocket (behind the plastic liner)
-pinch welds
-seat rails, where they meet the floor pan
-front of rear wheel wells, at rocker
-inner rocker area near where subframe bolts, rear wheel wells
-inside rear seat/storage bin depressions, at bolt holes
-floor pan, front driver and passenger, where it meets firewall
-A pillars, about midway down, from inside out
-rear quarters, wheel arches
-front fenders, rear area near rocker
-rear marker light cutouts on quarter panels

That's off the top of my head.

Might also want to take a look at:
How To Buy An '86-'92 Non-Turbo RX-7
How To Buy An '86-'92 Turbo RX-7