Don’t let it go for nothing. An old A/B amp can always be resurrected to something special, whether or not it has ‘market’ value .. I remember those old MESIA by Zoom lawsuit amps that were really damn good as they were built with quality components but they don’t sell for a whole lot compared to a real Boogie.
Just had a browse to try and give you an idea.. one old Marshall 50W head I used to have now listing at £3.5K 😯 – I never thought it was all that compared to my Dad’s Fender Super Reverb either… I wouldn’t go below £500 as a reserve assuming its working and sounds clean (not too many whistles pops and clicks .. ideally none with a good guitar plugged in on humbucking)
There is soemthing to be said for selling and buying a decent modeller / effects for the Peavey, if it gets you playing more. My tiny Vox modeller sounds better than my 64 AC30 as an AC30 till its at neighbour dispute volume…
EDIT: Wasn’t this the Tony Iommi amp? I’d lean on that in any advert