I just think some sellers throw a thing like this out there to see if there is a very desperate buyer lurking around. Or perhaps someone with so much money that $500 vs. $50 doesn’t make a difference.
That is one of the rarest original Japanese SACD's. Last sold on Discogs in 2011. The only copy I have ever seen on eBay, I paid over $100 and then later passed it on to another QQ'er for about the same when I sold all of my hi-res stereo discs