I am the king of the organ salvage, but there are a few I won't touch. There are some really nice older organs from Allen and Rodgers that can stand on their merits, even today. Most of those are solid state. The nicer tube organs from most manufacturers are so old it simply isn't worth while to keep them going unless it is a personal labor of love. The electronic maintenance can get overwhelming.
The one exception is the Hammond. The B3, and all other Hammonds which can sound a bit like it (most everything with a Hammond tonewheel) are favored heavily by musicians and studios for their distinctive sound. The C2 is reasonably close, enough (in sound and in parts) that it usually has more value intact, or parted specifically for the purpose of keeping other Hammonds operational.
Many of the Leslie tone cabinets that were paired with Hammond organs can demand decent money. They are desirable to both organists and guitarists. But that tone cabinet in the picture is not a Leslie. It is one of the earlier generation of tone cabinets made by Hammond. Their tone is different and can be complimentary (to a Leslie) for an experienced organist. That tone cabinet looks like a 1950's JR20. Its value is no where near the best of the Leslies. It does, however, have a great reverb effect if that is something you are into. It takes a bit of patience to set it up right.