s6 engine and trans complete , whats its worth?

I sold a good running1966 225 /6 with the head done- Vinton valve seals and hardened seats Installed with a full valve job- and a 904 transmission that worked perfect for $500.00 but no intake or exhaust. Guy did not want it- Offenhouser 2@ 1bbl set up. Sold that combo for $500. To another guy. Just food for thought.