It looks like the miles may be original, but given the underside condition and minor corrosion issues I mentioned above, it looks like it hasn't been stored very well over the years. Nothing that can't be improved obviously.
I found a YouTube video posted by the original owner showing the engine bay while the car is running. It looks like it's been cleaned up a lot since then.
http://www.youtube.com/watch?v=ZxxBpWN57q4
It's currently sitting at $37k on BaT but I have a sneaky suspicion that the seller is looking for at least $50-$60k. I wonder if BaT auctions come with a reserve?
G-luck to the seller and buyer. Curious to see what it goes for.