If you’re patient and can self-support, your local non-profits and their online stores may be useful.
It’s rare to see big gear NIB, but it does happen; have seen rack mount Cyberpower, 10 outlet, hi-watt units, IOB going for around $200+ in the last 6 months. Picked up a previous generation, 5 disk NAS for a tenth of its retail price, used.
You’re north of my border so my sites won’t work for you, but seriously, look into any Goodwill/Salvation Army type organizations, and don’t neglect local, they can be rewarding too.