eBay and Craigslist finds

Can anyone point me in the right direction of how to report a suspected stolen item on ebay?

The report function is useless as it doesn't seem to let you explain the issue and won't let you report the item as stolen unless you are the law.

http://www.ebay.co.uk/itm/SOMEC-ATOM-485CM-19-ALLOY-CARBON-ROAD-BIKE-FRAME-VGC-LOOK/120900937227?ssPageName=WDVW&rd=1&ih=002&category=22679&cmd=ViewItem#ht_500wt_1202

Item is the above whilst searching for geo info on the frame came across this.....

http://www.lbt.org.uk/cms/Forum/tabid/62/forumid/1/postid/4504/scope/posts/Default.aspx

Seems like the same item and seller is in Leeds.

I have emailed the webmaster on LBT website to contact the owner and want to cancel my bid on the bay but not sure whether sending a message to the seller is the right thing to do?

Stolen bike owner is convinced it is their frame, and the police are looking into it.

Hopefully a postive outcome will follow.