I just received this reply from them.
"The cylinder heads listed are NEW cylinder heads. These are brand new castings with all new parts. The have a 2 year warranty. I have rebuilt heads also but they are only about $20 cheaper than the new heads.
Thanks
Mike
Ideal Cylinder Head"
Note: I guess $357.99 per head (w/valves & springs) is not bad for brand new components if you want to go with a stock setup.