Are you getting eBoatTrade spam? I seem to get their ads from different e-mail senders every day in every sailing forum and group I read.
Boycott these spammers! 
I have never seen it.
They are targeting the Yahoo groups like TBCSI. Mystere, Spinnaker, etc. Here are some of the senders in just the last week. I hate this stuff.
causticabrasive
inthenextcentury
primativecrude
They have registered on our catamaran sailors egroup in Ireland (Europe)and sent emails out to everyone.
they hit up our club's old email list.
you do know that you can legally press charges for unsolicited email... aka spam.
I was literally flooded with "sell your boat with us" emails after I posted a for sale add in the Catsailor classifieds. It did sell the boat - but I would hesitate to post my email there next time.