I have one on loan at the moment. Great little amp & I like it very much. BUT the emphasis is on 'little' & the price IMHO is over the top. Regardless of its bells & whistles, volume output, & the great tones its capable of, it's still just a 1x12" combo utilising a small cab. New price is now £499 (reduced from £599) but IMHO this is still too much money. For that price I'd expect the 1x12" extn cab to be included - which it needs, not for volume but for fullness of tone.
The problem with any 1x12" amp (especially when the cab is small) is it sounds boxy. When I plug it in, I love the tones - but when I then plug in my AD120VTX next to it, the Pro just sounds boxy and way less full in sound by comparison. It's nothing to do with the Pro's design or quality, it's just the law of physics.
I think the Pro is great - definitely the best of the new Valvetronix breed, no question, & I'd like one myself. But Vox has got the pricing wrong although I suspect the R&D costs were a big factor and were just strangling Vox here. My view is that they should have brought out a 2x12" 300w combo version and/or offered the 1x12" combo plus 1x12" cab as a package for £649, with the combo at £599 - this would have been a better sales strategy as customers would feel they were getting better value - the 1x12" on its own just doesn't look much! Most potential customers, including me, would baulk at a 1x12" amp for £599 (or even £499) when you could buy an AC30 Black Comet for £599!
If Vox want to sell the one on Ebay, I'd suggest they put it in with a start bid at £300-325 maximum.
Rich

"I started out with nothing ...and I've still got most of it left!" (Seasick Steve)