Such a coin would have been issued as part of a mint or proof set.
Any value would depend on the metal it was struck from and the design of the coin.
20,000 dollar
Face value unless it is crisp and unfolded.
The Australian Dollar had not yet been floated in 1981 and was tied to the US Dollar. In 1981 One Australian Dollar was equal to One US Dollar. One Dollar AUD in 1981 had the purchasing power of about $2.85 AUD today. One Dollar AUD in 1981 had the purchasing power of about $2.64 USD today. NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.
The value of a 1981 twenty dollar cultura Maya coin can vary depending on its condition, rarity, and demand among collectors. It's recommended to consult with a coin dealer or appraiser to get an accurate valuation.
Unless it is a "proof" coin (actual silver), it is worth one dollar.
An Australian 1981 Two Hundred Dollar coin (Royal Wedding), uncirculated and in absolute mint condition could fetch up to $420 AUD. There were 77,890 minted. Any valuation presumes that the coin is in the original packaging and remains in mint condition. A reputable coin dealer will be able to give a more accurate valuation.
$18
Unless it is a "proof" coin (actual silver), it is worth one dollar.
A 1981 20.00 cultura Maya Estados Unidos Mexicanos coin is typically worth its face value or slightly more to collectors. Its value can vary depending on its condition and any potential collector interest.
Susan, not "suies" Dollar, not half dollar (you did look at the coin's denomination, didn't you?) Anyway, circulated 1981 coins of any denomination are worth only face value. Go ahead and spend it.
The only U.S. one dollar coin dated 1981 is a Susan B. Anthony dollar. They are not referred to as Liberty Dollars. None were released into circulation or made from gold. It's been gold plated. Look at the coin again and post new question.
A common issue, its value wil only be a dollar or two.