As always, this stuff depends on where you live, but my opinion - it's worth about $100 max. There is some interest in the earlier high compression heads, but it doesn't sound like this engine has those. And 385 series engines are like FE's, a lot better aftermarket cylinder heads out there, not much reason anymore to use the iron heads. If it's a 429 you're not getting the more desirable 460 crank, there's about zero interest in 429 cranks. So you're getting a block and some misc parts. If you have a need for one and it's in nice shape, maybe worth more. Always worth checking.