Books & media
Encyclopaedia Britannica 15th edition, 30 volumes, 1979
Complete 1970s Britannica sets are heavy, common and mostly bought for the look of the spines on a shelf. A full matching set in clean condition finds a buyer; a broken or damp set is usually a giveaway.
Estimated resale range (used)
$20 – $60
A ballpark, not a quote. Condition moves this number a lot, and so does who turns up to buy it. It isn't an appraisal and it isn't a dealer's offer.
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What matters when you check it
- Count the volumes and confirm the set is complete, including the index and any yearbooks
- Check for water damage, mold and warped covers, especially on sets that lived in a basement
- Note the binding style and cover colour, since buyers want a matching decorative run
Where the number comes from
Watching what these go for, not a record of sales. The range is a judgement call from what the same thing fetches secondhand. When an item has real sources behind it, they'll be printed here with the date they were checked.
Before you sell anything, look at sold prices rather than asking prices. Asking prices are wishes; sold prices are evidence.