So with my recent purchase of an olds 455 the sbc parts I collected are taking up space in the garage. I know a guy running a 406 in a 78 regal that got crushed by my friends challenger a few nights ago and he wants to buy the heads I have. The heads are fully ported 292 turbo heads from the 70s. I got the heads through a friend of a friend that ran 10.50s in a 3300 pound nova with a 406. The heads were rebuilt about 2 years and have not been on a motor since. I have seen prices all over the place on these heads. I saw people saying $500 is a good price for rebuildable cores and Ive heard dont spend more than a few hundred for a good set, the prices seem to be all over the place. What do you guys think they are worth?