Why Such A WIde Variance on Estimates on 1998 Volkswagen Golf

LOve the idea of your website but why such a wide variance on estimates? Just looked up the cost to change a catalytic converter and its between $400 and $1200 dollars. I probably could have guessed and it would have fallen between those numbers.

Asked by for the 1998 Volkswagen Golf
There is a wide range of different quality parts available. You can choose poor quality aftermarket parts - which cheaper - to a good quality OE part which could cost few times more.
It's the same with every parts.