For Colibri, what X said ... I've bought Colibri for years and never paid more than $2.99
That said, I've become a fan of LAVA, thanks to CWilhelmi ... it's more highly refined, plus, a more favorable cost per unit of measure ...
I've never tried Vector, but I like the sound of what Slimboli said ... I might try it
Bottom line: never, ever use Ronson, even if they pay you to take it ... it's lighter poison ... always use at least a triple (or more) refined fluid ...