On the street both items are
The Peavy is the kind of bass that can't be replaced for what you could get for it... if that makes sense. You could sell it, but the money you'd get (in cash or trade) wouldn't be enough to replace it with a bass of similar quality.
Hmm couldn't you buy it from yourself? lol
Any item is only worth someone will pay for it.
Is your logic the only people that want these basses bad enough to pay are previous owners and they wish they never sold them in the 1st place?
Unless the amp is a rare vinatge (you said blackface but that doesn'tmean pre cbs black face right?) An istrument is easier to sell than an amp. (I own 16 basses but only 5 amps.)