assuming that you are talking about series 2 supercharged l67 parts , I typically sell stock M90 superchargers for $100 + shipping and cylinder heads for the same.
a top swap which would include everything else of a sc engine needed to convert non sc l36 to sc'ed should bring $300-400 plus shipping depending on miles &year
this would include throttle body , intake manifold , fuel rails , injectors , boost bypass valve, boost soleniod all other brackets ,vac lines , accesories etc... from the top 1/2 of the engine as well as the crank hub/harmonic balancer that has the 2nd set of grooves to run the belt , all tensioners & idlers that contact the sc belt , and I include the sc belt also in my top swaps