You are bidding on a used Edelbrock Performer intake manifold for all Ford 221/260/289/302 cubic inch V8 engines, part number 2121.  The manifold is in good used condition, with smooth gasket surfaces and good threads in the bolt holes.   These are currently going for at least $300.00 new.  Don't be fooled by the Chinese knockoffs from the Shanghai speed shop that have flooded the Ebay market as of late.   Happy bidding!