What determines the price of a converter?

Two factors–the precious metal content and its weight–depend only on the converter itself.Furthermore,even converters of the same model can have slight differences owing to subtleties of production, exploitation and the composition of the fuel used.
The third factor in calculating the price are the market prices of platinum, palladium, and rhodium. As the prices of the metals themselves change, so do the prices of catalytic converters.