Liberty 2.5 dollar gold coin values are rising with the precious metals. The minimum you would expect to receive is $254 each.
First, rare dates. For example, the few surviving coins dated 1885 are worth over $400. And it is only one of many, very rare and valuable dates in the Liberty head series.
Second, what is the condition of your coins? Rare dates are one factor. But, nice looking, high condition coins are very appealing to collectors and highly valued.
Pictured is a stunning Liberty $2.5 gold piece, a very desirable coin, not because of the date, but its condition. Any collector would gladly pay a premium for such a coin.
Find the highest accurate value of your old gold coins by judging their condition, see more about this below. And then checking the value chart.