http://i125.photobucket.com/albums/p...713_640_02.jpg
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Just from what I can see (and I can't make out what a lot of them are), I would say just in firearms alone, based on US market prices, there is somewhere between $15K and $20K invested in that collection. It could even be more if we knew for sure what some of those weapons are.
Depends if the weapons are NFA or not.
A full auto Ma-Duece, far right of the picture, would run in the 350-400K$ range. Full auto M4's are in the 15-20K range.
If they're all NFA then I would estimate well over 750K$. If they're not NFA I would say less then 100K$, but more then likely they're all airsoft or reproductions and I'm going to say 2K$ max.
LSFW