Hi Bonden - welcome to INForum!
That's a strange situation - I'll see what more I can find out.
The domain was originally registered December 7, 2006. It looks like it was dropped December 7, 2008 and then you registered it when it dropped.
The previous owner seems to be a webmaster and a bit of a domainer. He looks like he's alive and well - very strange he would let it drop if he had paid $10K for it (or he could have bought it from someone who paid $10K).
I wonder if this is one of those transactions where a domain is "sold" to a friend for a high price to try to increase the value of the domain (or the domain extension).
All in all, it's very strange. Thanks for alerting us to it. I think perhaps we should put a footnote on the chart letting people know this.