If you were looking for a car and they were car dealers, would you trust Mr Cameron, Mr Milliband or Mr Farage to do a decent deal and not rip you off.
Foot in mouth rather than tongue in cheek
In any case I did buy a second hand car once.
FROM someone, not OFF someone
Buying anything from a politician would immediately bring to mind the expression Caveat Emptor
Methyl you can't possibly mean the Margaret Hodge who was in charge at Islington when child abuse was occurring in children's homes on her watch and who scoffed when it surfaced in the press. Or the Margaret Hodge whose family business paid only £163k on revenues of £2.1billion (0.01%) in 2012. You are having a laugh aren't you? Ghastly woman.
http://www.thecommentator.com/article/4896/overrated_margaret_hodge