I’ve just read this thread and the OP said he liked the Ultimate Safe . In 2020 I needed a larger safe but as my house was going up for sale , I figured I’d buy a cheapish extra safe and then get a single bigger and better unit when I’d moved . I bought by mail order the “ Ultimate Safe 5 gun cabinet for about £130 . Police Approved my bottom ! . Absolute flimsy Chinese crap and as delivered I could have pried the door open in about 15 seconds with a decent bar . The internal ammo cabinet would take about 5 seconds with my bare hands . The never defeated triple blade lock begged the question , ‘never defeated by who ? ‘ perhaps next doors 5 year old might struggle . Honestly I couldn’t have slept with real guns in that cabinet . It ended up with just airguns in it after a cabinet shuffle round , I left it in the house when I moved .
With respect to buying second hand gun safes , search eBay for Brattonsound , you won’t go wrong with one of those .