What price for these heads?
 

I am swapping up to Pro Action aluminum 220 heads, for my 375 Destroker.
The heads from my 355 weren't enough for this motor.
I want to sell my Iron, World, SR torkers with 67cc chambers, professional port and polish, big 2.02 valves, 7/16 screw in studs, set up for flat tappet solid Cam on the valves or hydrulic cam lifters and springs in the box
I have about $1000 into the heads
What is a reasonable selling price?