I bought it used. And the insurance does not know and appears to not care. The policy is replacement cost for like and that means new, not used.
Doc
The links are to manufacturers who I know are represented in the US
http://www.kverneland.com/irj/porta...ve/Home/Soil Equipment/Ploughs_0_/Ploughs.docAll but John Deere make both one way and reversable plows.