Early Carbs $ Unobtanium?

I'm new here so forgive what might appear to be a dumb question but how much does a set of really early unribbed carbs go for? I have one of the first Z1s but its fitted with ribbed carbs.
Thanks,
Kevin

I sold 2 sets last year for around 600 each They where rebuilt and ready to bolt on. I have seen them go as high as 1000 and more

Peter:
Thanks for the response. I will have to keep my eyes open for a set to rebuild as since my bike is one of the first 100 built it deserves the correct carbs.
Kevin

yup is worth a few bucks. I know a little about the history

About a year ago "oinkjohnson" from the "e bay" and his team of shill bidders got a set up to $1,800!
That was the bike that got 2,800 for the frame and engine case. The carbs went for $1,800 bucks WTF?
He gave the old timer, who owned that bike since new $500 for it. Go figure!