You can do two things with this. One see if you have any pictures of the serial number - people always miss jot them down on bills of sale. If you can you can connect anything with it you can contact the VBPD and they actually have a unit (some guy who probably just cruises forums and craigslist.. and checking out pictures on the chive) that go after craigslist thieves.
Two and the most important... the guy listed his phone number. Number one rule in craigslist don't post your number.... even if he didn't steal your board its always fun to mess with people... ;)