How much savings? Has it already be registered with the manufacturer? Is the installer onboard with the plan?
I’ve bought used stuff, sold some too. I was looking for a G5 a few months ago, a guy had one for sale, locally. I never went far exploring the deal. The savings wasn’t great, it had a bit of age to it, not sure about warranty remaining, if any. With a new unit one usually gets full updates to start off fresh, not the case used.
Unless I’m saving a bunch, I like to start factory fresh with full software & database updates, add some warranty time too. The other part is dealing long distance with a potential unknown seller.
Like so many things, it depends. If it’s like a used KX-155 to slip into an existing slot, the seller is reputable, with a 30 day test policy, could be very doable.