Never heard of them, I will have to do a google. Pretty pricey. There was a guy that sold some one of a kind coins at a B&M near me. Here is a Black silver Python they have for sale. https://www.herobullion.com/2022-palau-2-oz-silver-black-python-coin/
Hero Bullion is a rather new company. I've bought from them no problems. I only buy from Apmex when they have sales, otherwise their prices seem to be higher. It's wise to watch for the sales from the major dealers for best prices. I like SD Bullion. Most of the major dealers also have eBay stores. I can sometimes find their prices cheaper on eBay than their own web site.
Ive seen several people on YouTube buying from Hero that haven’t had any issues. Apmex is fine to buy from but their prices tend to be a touch higher than most. There are also many other online bullion retailers out there. SD Bullion is one and another I just found out about is Pimbex. Personally I think your best option, as long as their pricing is fair, is your local dealer. I will choose my local shop over any online seller almost every time. It’s nice to view the stuff in hand before purchasing, build a relationship and support your local economy.
APMEX has a great reputation plus an excellent selection, most other dealers have less, and I can be absolutely sure I am getting the real McCoy
I wouldn't be scared to order from Hero if the price is right. They are a legit business, I've heard of them a few times, never heard anything bad.