The price might not be too far off Cap, I based my opinion on what I paid about 4 years ago for a 2004 model year 2400 SC3, with a 350 MAG MPI and B3, in great condition, never painted, very clean, with just over 70 hours on it, with a 2007 dual axle roller trailer. 20K. The original paint on the drive was still shiny, with only a little bare aluminum on the bottom inch of the skeg.
While the 2500 SCR has more content than my SC3, it is older with significantly more hours. Not necessarily a bad thing, of course. You should be able to get an idea of it's market value by surfing the web.
Since you've already had experience with outdrives, and you're mechanically adept, you'll know what to look for on the mechanical side. If there's wires dangling all over the place, the engine and bilge isn't clean, rust tracks running down the manifolds, etc-etc - well, you know what to look for. If the under the hood bits look like they've been well maintained they probably have been. If all that stuff is a mess, well, a REAL close inspection is warrented.
Mine was so tidy I did not bother with any surveys, just did a sea trial.
Good luck, let us know what you discover.