They are craigslist scammers.  I saw one of their ads wanting to sell a Honda generator for less than half what it was worth.  It was on an Iowa City craigslist ad and they uses a Florida phone number, one of many they use.  Check them out here.

http://reportcraigslistscams.com/xzclf/1/posts/1_Reported_Craigslist_Scams/1__/15335_Excellent_source_of_power_for_RVs_Honda_Generator_eu3000is_1000_.html