I think for Singapore only, Diesel fuel oil is cheap
No, seals are cheap, engines expensive.......
One difference is that one costs more ;-)
modern tech is to expensive so cracking IS USED BECAUSE IT IS CHEAP AND EASY
it depends on taxes, how much it cost to import to that area, and the economy.
Its expensive
Expensive, costly, precious, priceless, or valuable. Those are opposites of cheap.
expensive
expensive opulent, expensive, pricy, highbrow,
Nylon is not an expensive material.
or
Cheap