Nah, it turned out that it was registered as an "old" firearm, which meant I couldn't shoot it...so I gave up. Might as well have gotten me a deactivated repro for that.
Basically, if you register something as an "old" firearm, you can't buy, possess or manufacture ammo for it, and you can neither shoot it nor carry it. So I would've bought myself a really expensive wallhanger. And it'd have to be in a gunsafe so not even eyecandy.
Though the ad is still up and the guy lowered the price, if I change my mind I'll inquire more about it.
It's not deactivated, it's still functional. But as I said, it's no use.