What will be the gold price tomorrow?
You cant find out until you go and check the next day.
It is an American Eagle gold coin, not a double eagle coin, it contains 1 ounce of pure gold, its value depends on the spot price of gold for example, today it would be worth just a bit less than $1,300. However, tomorrow it could be worth a lot more or a lot less, it just is dependent on the price of gold.
The value of gold remains steady as the price of gold continues to fluctuate daily. This is because of today's ever changing economy. As the price of the US dollar (which is backed by the gold standard) changes in worth the price of gold also changes with it. The price is dependent on the price of the dollar, the economy, and the political climate.