Classic Books. Signed First Editions, 10 volumes. In Very Good condition. All ten for, $100. OBO. I have checked their value and the least valuable one is worth over $20. so you could still sell for a profit or keep in your collection. Also 10 Volume set of "The Great Ideas Program" in good condition. aged, and one volume was published with the inside of the book upside down. But the value of this set is over $350. Asking $50. for this set. Or will sell all these books, both sets, for $120 OBO. all.