Could be a good learning experience, if that's what you're going for. Sitting for 4 years is plenty of time for the carbs to be crapped up if it was just parked one day and left there. That could be anywhere from a "seafoam" fix to a total teardown and rebuild, it's tough to tell. Rebuilding the vmax carbs seems to be a pretty harrowing experience, though there's a great step-by-step turorial with pictures here to hold your hand. Carbs and maybe the battery, but otherwise 4 years isn't that long of a time. My Magna was sitting(on the atlantic coast) for well over 10 years and the only thing it needed was new plug wires and tires. Amazingly, after running it for a bit, the initial rough running cleared itself up and never gave me so much as a hiccup afterward.
The "flip this bike" idea is probably the best way to go, unless you want 2 vmaxes. TBH, parting something out is a lot of work and can take a long time to get return on your investment. Get it running good, clean it up, toss some new rubber on it, and put it up for $2500.
