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y-pipe for early a-body small block
I had (past tense) one. Cut it up for scrap. Never figured anyone would want an used Y pipe. Did save the flanges/collars though that go to hold pipe to exhaust manifold(s). A good exhaust guy should be able to make one up, though. $10 plus ship for the collars, if you wanted them.
Accurate Exhaust looks like $380 for a new Y pipe Welcome to Accurate Exhaust Products, Ltd
Waldron Exhaust makes them, aluminized or stainless, High performance 2.5 output or std 2 barrel. Call them, they were nice to deal with. 1965-67 Barracuda w/273ci 4bbl carb in Stainless Steel  - $713.00 : Zen Cart!, The Art of E-commerce 1964-71 Barracuda/Valiant V8 All Stainless  - $600.00 : Zen Cart!, The Art of E-commerce