Generally, uncirculated notes in excellent condition can be worth significantly more than notes that have been in circulation and show signs of wear and tear.
According to the website CoinTrackers.com, the estimated average value of a 1950D $20 bill is approximately $35 in circulated condition and $150 in uncirculated condition. However, actual values can vary widely based on the specific details and condition of the note, as well as market conditions and demand from collectors.
To determine the exact value of your note, it is advisable to consult with a professional coin or currency expert who can examine the note in person and provide an accurate assessment of its value based on its specific characteristics.