$900!
A house payment + property taxes for a month.
Why are headers so expensive? The only reason I can think of is the welding. That's crap though too because you don't get much of a discount (if any) if you by them unwelded. For the usually meager performance gains, headers seem to be the worst value out of anything you can bold on your engine besides dress-up pretty bits. Unfortunately, most manifolds won't work on a 1st gen so we are forced to buy headers.
If someone came up with a header design as that fits as nicely as those Speedtech ones appear to and put a reasonable price on them, they'd corner the market and make their money back in droves. Unfortunately, it seems that the manufacturers that have the best fitting units charge huge money for them and the ones that are more reasonably priced don't bother to make theirs fit any better which would put the more expensive ones out of the market. Makes no sense to me.
I'll stop ranting now.