$1,370.00 to $2,650.00 retail in circulated condition assuming no mint mark.
A date and mint mark (if any) is needed. Please post new question
If the coin has one, the mintmarks are on the reverse under the eagle.
This coin's gold value is now higher than its collector value. If worn, it would sell for about $475. If in nearly new condition, about $550.
With date of 1927 it has to be a $20.00 Saint-Gaudens coin not a $20.00 Liberty Head coin.Without seeing the coin and assuming no mint mark, retail values for circulated coins run from $1,270.00-$1,570.00 and uncirculated at $1,650.00+. I suggest you take it to a dealer or collector for a more accurate evaluation.
In average condition, about $500 for its gold content. If the coin has only slight wear AND there is an "O" mint mark on the back, it has a higher collector's value, though - $700+ depending on the amount of wear.
If it has one it will be on the reverse under the eagle.
Please post a new question with the coin's date and mint mark.
In 1875 silver dollars were called Trade Dollars and are valued from $200 to $125,000 depending upon the mint mark and the condition of the coin.
Only 2 mints struck double eagles that year, Philadelphia (no mint mark) and San Francisco "S" mint mark. The mint mark for all Liberty Head double eagles is on the reverse of the coin under the eagles tail.
The star on a 1958 Liberty head nickel indicates that it was minted in Denver. It is called the "Denver Mint Mark" and signifies where the coin was produced.
The high price of gold means that your coin is worth more for its metal content than as a collectible. At current prices it would retail for about $500 regardless of mint mark.