For those who will get this call in Massachusetts, you should know that before you institute legal action in the state, you should file the following <a href="http://www.state.ma.us/consumer/Pubs/demand.htm">demand letter</a>.
The applicable document to site is <a href="http://www.state.ma.us/consumer/Pubs/shop.htm">this one</a>. In particular, the section that reads:
TRUTH IN ADVERTISING AND SALES
Under state law, a merchant must tell you about any fact that may influence your decision to enter into the transaction. For
example, a used car dealer would have to disclose that a vehicle was in a serious accident
(940 CMR 3.16(2)).
is probably very applicable here.