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My Concours had a broken exhaust valve at 93,000 miles so I swapped the engine with one out of a parts bike I serendiptiously had purchased this past Spring (solely to sell parts from). The parts bike turned out to be pretty profitable even without selling the engine and I actually cleared about $350 (so far) on the deal and still have plenty of semi-valuable parts (like the radiator, carbs, forks, wheels, final drive, junction box, instrument cluster, brake rotors, muffler) left.
The swap was a lot of work because of the shaft drive, but it's done and works well, aside from a minor and fully understood (I just need to order the part) electrical glitch that was there before the new engine was put in.
I can't believe how dated that bike feels compared to my 9R but is sure is nice for long rides, two-up, and cold weather riding.