They expect to get several hundred dollars per coin, above and beyond any bullion value as they are colonial era coins.
Some will probably exceed 1k individually. The group also has plans to sell them in dribs and drabs so as not to tank the market for these type of coins.
In that range/produce, every salesperson/dealer expects/hopes to get several hundred dollars per coin over what they pay for it. It is a shell game. Don't be caught seatless when the music stops. The recovered SS Central America hoard coins were poor investments at the marketed price. With improved technology to recover wrecked ships there will be more of these coins coming on the market than there are wealthy collectors willing to pay the price, you know people who don't have to worry about the price of gasoline or schoold bills for children.