Clifford's big bucks.
Based on the experience of others for the past 5 years, I'd never, ever give Clifford ANY of my hard-earned dollars, directly at least. If I just HAD to have a set of their headers, I'd find a pair on ebay, but that's the exception.
Pretty much everything Clifford sells can be gotten elsewhere from better vendors (and usually cheaper). It just takes a little more legwork.
Just my .02.
VM