How much can I sale these RB heads and parts for.

My engine builder got them for me a few years back and I can’t remember how extensive the port job was but they look like they where professionally done as it’s been blended in real good and is smooth as a baby’s bottom. I know that doesn’t mean anything but they look good. Do you recall the exact name of the group on Facebook. Thanks
Exact name is "500 Inch Mopars"