[michaelroy]

I read on some prior posts that these manifolds are quite rare, anyone know the value?

[gto4evr]

you may be mixing up the RA3 for RA4, the round port 4's are far more rare than the D port 3's. value is relative but you're stuck pretty much with needing a buyer that's after a specific date code to warrant any big money. They make really nice repops you can buy brand new for $379 that also have the bigger 2-1/2 pipe openings that everyone's after now days compared to the smaller factory 2-1/4 size opening