They are worth a bit more than a vertical input 2203, which seem to go for 2500 on average so I'd say that's a good price since you'd get the cab for free essentially. The black tolex Jubilees also have the final preamp design, which seems to have more low end than the first early 87 versions.
No, it won't necessarily need work at all. Caps don't always have to be changed on these amps. Check the underside of them first...any large bulges or white material coming out of them, yes change them. But, if the amp doesn't have that AND it sounds punchy like it should, keep the original caps.
60+ Marshalls and counting for me over the years....only 1...needed the caps changed.
If you pick it up, make sure you run one of the Master volumes at 6 or more, or the amp can sound thin. I always ran the Output master on 10 which essentially makes it a solid 2 channel amp.
