I don't have the room to build huge armor columns but I do have a few multiples.

Cobra
2 25th HISS (black)
1 25th HISS (blue)
1 25th HISS (red)
1 DTC HISS (modified)
4 25th CLAWs
4 25th FANGs
4 25th Flight Pods (white)
1 25th Flight Pod (blue)
3 25th Firebats
1 25th Rattler
1 25th Water Mocassin

Joes
1 25th VAMP
1 25th VAMP (customized)
4 25th RAM Cycles
1 25th Armadillo
1 25th AWE Striker (green)
1 25th AWE Striker (tan)
1 25th MOBAT
1 25th Night Spectre
2 25th SHARCs
1 25th Conquest
3 25th Sky Hawks

And I have some custom vehicles as well but these are my G.I. Joe vehicles I've "armor" built.

__________________
Of course that's just my opinion, I could be wrong.