Feltrider,
Where are you located? So-Cal is a big "state"....... I wouldn't worry about the splines. A good tell tell, is to take a magnet with you and run it around the wheel. See what you pick up. Granted, they may have been ground earlier and cleaned up, but if the bike has only 24k on it, the O-rings are probably in good shape. Unless someone removed the flange and forgot to put the thrust washer back, I would be all over that price.
did the guy do his own wheels, if so ask his process.
The I had an 01 with 130k, zero problems. Let me know If you are in the San Diego area and maybe I can help you out with some things.
Hey Don and Larry, Looking forward to yosemite.