i have just looked at 2 lighters on auction and both are supposed to be zippo?
this might seem a silly bit of advice but the seller has now sold 12 of theses and the members seem happy? leaving positve feedback,
he clearly states zippo lighters for sale ! which they are definately not, he sells them as unopened unwanted gifts on a wrapped display card and you can clearly see it says oil filled lighter in the auction photo,
the advise is simple! any seller will show photos of the base of a genuine zippo lighter and it is never referd to as oil filled! theses cheap copies are worth only about 50p at the most, so people please ask as many questions if photos are not shown and if they cant quote the writing on the base be sceptical and look elsewhere,
once you have used a genuine zippo you know why people say there the best,
you know it makes sense so open your eyes before you click and use the ask seller a question link,
cheers hope this helps somebody?