I reported the situation on Jenny’s alleged Nimbus uni, http://www.unicyclist.com/forums/showthread.php?s=&threadid=40359, to Ebay security on May 14. The unicycle sold on May 23.
I got a response from Ebay today, May 28, that they will initiate an investigation:
Hello,
Thank you for your report.
We would like to let you know that we have received your email and we will thoroughly investigate the information you have provided <snip>
Best Regards,
eBay Community Watch