$20 Double Eagle:
- Average Condition: $1,500 - $2,000
- Fine Condition: $2,500 - $4,000
- Very Fine Condition: $4,000 - $6,000
- Extremely Fine Condition: $6,000 - $10,000
- Uncirculated Condition: $10,000+
$10 Eagle:
- Average Condition: $850 - $1,200
- Fine Condition: $1,200 - $1,800
- Very Fine Condition: $1,800 - $2,500
- Extremely Fine Condition: $2,500 - $3,500
- Uncirculated Condition: $3,500+
$5 Half Eagle:
- Average Condition: $500 - $700
- Fine Condition: $700 - $900
- Very Fine Condition: $900 - $1,500
- Extremely Fine Condition: $1,500 - $2,000
- Uncirculated Condition: $2,000+
Please note that these price ranges are approximate and can fluctuate based on various market conditions and specific coin characteristics. It's always recommended to consult reputable coin dealers or experts for the most accurate and up-to-date pricing information when buying or selling St. Gaudens gold coins.