Part of it depends on when you sold them. I paid between what you sold those heads for and the OP's asking price(for bare heads) 6 years ago for fully dressed heads with original tulip valves ready to install. I bolted them on and went.
2008
Bought a nice set of Butler ported E heads with room to spare. Picked up a full second. Only worth $ if you have a Ram Air II OR are running a class on the strip.
Si Vis Pacem Parabellum
1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.