The SVT200 is an excellent solid state head. From what I understand it was only made for a short time, then replaced by possibly the SVT350... not as good.
I was looking for one for quite some time, still haven't bought one but it's definitely still on my list.
Simon Gallup still uses 2 of these heads with The Cure, that's some lifespan for a amp that built in the late 80s early 90s.