It is commonly repeated that early investors only paid $1,000,000 USD for the founder's rewards, and therefore the price is ~$.50 a coin, but there is no reason to believe this is true. When companies raise money, they don't sell 100% of their stock to the first investors, so why would the Zcash company do so? It is more likely that they sold something like 10-20% of the company for those coins. In that case, the investors could have paid as much as $5 per coin. And remember, that sale was a couple of years ago, back when things were highly uncertain. IMO, an offer for ZEC at less than $5 per coin is laughable.