What is the value of a 1974 Mets official yearbook NL championship edition?

Answer 1

1974 New York Mets YearbookThe 1974 New York Mets Yearbook with the cover picturing N.L. Champions pennant has a book value of $15.00 - $20.00 in Excellent - Near Mint condition.

Condition is very important and minor flaws will bring the value down significantly. Yearbooks in exceptional mint condition could sell for more. Common flaws with yearbooks would be staining, foxing (yellowing), fading color, stains, creases, rips, loose pages, cracked binding, and writing on the cover.

Answer 2

1975 New York Mets YearbookThe 1975 New York Mets Yearbook with the cover picturing Tom Seaver has a book value of $15.00 - $25.00 in near/mint condition.

Condition is very important on getting anywhere near this price. I did a search on eBay and the prices were far below market value. Common flaws with yearbooks would be staining, foxing (yellowing), fading color, stains, creases, rips, loose pages, cracked binding, and writing on the cover.