Standard Edition:
* Good condition (minor wear and tear, all volumes present): $50 - $100
* Very good condition (minimal wear, no major damage): $100 - $150
* Excellent condition (like new, no visible flaws): $150 - $200
Deluxe Edition:
* Good condition: $100 - $150
* Very good condition: $150 - $200
* Excellent condition: $200 - $250
When determining the value of a particular set, consider the completeness of the encyclopedia, including maps, index volumes, and supplements. The presence of all original materials can increase its value. As always, values can fluctuate based on individual circumstances and the buyer's interest, so it's recommended to research current market prices for the most accurate evaluation.