I think the Technika is the most versatile camera I own. I like being able to switch between rangefinder press camera mode and view camera mode, particularly for travel.
It's hard to say about the condition, but if the bellows is good, the front rise gear isn't stripped, the Graflok slides are working properly (these three things being the common problems), and the lens is cammed (serial number on top of the cam matches the lens and no serial number on the bottom of the cam, which would make it a Tech IV cam), it's probably worth on the order of $1400-1750.
On the other hand, while it can do a lot of things, other cameras can be more convenient for particular purposes. On most monorails, for instance, the back movements are easier to use, and cameras with symmetric movements can make more intuitive sense. If you are a climber and shoot from high elevations often, you might prefer a camera that doesn't have to be turned upside down to get front fall. If you're only going to use one cammed lens, a Crown Graphic is lighter for handheld use than a Technika. For $1500, for instance, you might be able to get a Sinar F and a Super Graphic and have money left over for a lens or two, and you might ask whether a combination like that serves your needs better than a Technika.