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Northwest safe is a good place to check, also costco....as far as size, trust me when i say the one you buy will be too small eventually...
Costco is a good place as well as big r if your near Spokane. Remember there isn't sales tax on safes in WA. Also remember that each gun is probably worth $1000 and 6-8 of them add quickly to dollar value. IMO a safe is not a place to save money. I did and wish I would have spent more. Buy bigger than you think.you will need because it will fill up...