H.E.G.O. Sources

[Paul Shackleton]

I realise this might be a "how long is a piece of string" question 
but.......

In UK scrap yards, which is the best HEGO sensor to go for? (ie what make 
and model of car?)   Best means cheapest and/or most abundant.

I presume I will be able to connect it up to a standard digital volt meter 
to read it and will have to provide a 12V supply to heat it up?

Any help will prevent endless explanations at the scrap yard. An idea of the 
sort of price I should be paying would also be appreciated.

Paul
University of Huddersfield