Magma now makes the molds. I checked with them about 2 months ago on a 6 cavity mold and $275 was their list new price.
The molds never became widely popular because of price and only serious bullet casters would buy them. H&G was before auto casting machines. With 3 6 cavity molds, you could have a very good casting day once you got the molds up to temperature. I used a second 20 pound lead pot to keep metal up to temperature and never let the molds cool.
I put one on the Graybeard a couple of months ago for $150 and never got a bite. I'm not surprised. Most people probably have never heard of such a mold.
If anyone wants to shoot CAS and cast their own bullets, the H&G or Magma mold is the way to go.
I have one 357 caliber in a 10 cavity. The blocks are so big and heavy, that once they get up to operating temperature, you can throw out some bullets with a bottom pour furnace.
I don't use mine that much anymore.
Harold Clark