bfoster you're a cheapskate like myself...I like that.
My latest safe is about 60x24x28, 1/8 thick walls with 1/4" thick door. Sargent & Greenleaf lock. Price. FREE. The Navy was throwing it out. I asked if I could buy it (there were about 20 out there, some were big double doors like the one you described). The guy told me they were getting ready to pay someone to dump them and if I would haul it off, they'd save themselves some paperwork. I insisted on paying and he told me that the Navy considered it trash for disposal and that I would be rendering them a service.
You know, I could get use to helping Uncle Sam.
Vigilantibus et non dormientibus jura subveniunt