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Standard headers (usually ported) seem to sell for about £100, Aftermarket headers like OBX and Gruppe-S sell for £350 ish but they are stainless versions, not sure what your are, mild steel or stainless? Secondhand standard turbos £350 - £500. Problem is people tend to go the aftermarket route rather than the standard route.
Maybe interested in the headers, drop me a mail what you want for them and some details on what they are made of, flange fittings etc?