How do I found out what my old baseball cards are worth?

My sister found a bunch of old baseball cards that her no-good fiance left at her house. She has a huge binder full and knows nothing about baseball. How would she go about finding their value without looking them up one by one on ebay? What shouldn’t she do?

Buy a Beckett Price Guide or look on Beckett.com!
If you want to sell, I am always looking for 1933 Goudey, 1952-55 Topps, 1887 Allen & Ginter, 1909 cards, and Turkey Red Cards, and pretty much all hall of famers older than 1979.

Baseball Cards

MagnaCard All About Your Locker Magnetic Epoxy Sports Magnets, Assorted variety pack. 2 Magnets in pack(61221) $4.99 Assorted variety pack contains 2 magnets. Packs contain either Baseball and Football magnet duo OR Soccerball and basketball magnet duo. …

Table Number Card Holders 12”; $1.48 SALE ON ALL TABLE CARD HOLDERS Table Numbers Card Holder 12” H X 2-1/2” D Heavy Base Chrome Plated Steel These card holders are perfect for prominently displaying table numbers. They are made of chrome plated steel with a heavy base to enhance balance and have a deluxe polished finish. The holders are designed to be free-standing while holding a table number centered on the table. Product Featur…

MLB Philadelphia Phillies 36-Ounce Crystal Freezer Monster Mug $12.41 36-ounce crystal freezer mug takes refreezability to a whole new level. Holds a quart of your favorite beverage and keeps it colder longer. This high quality crystal freezer mug, keeps beverages colder than other freezer mugs! Eliminates the need for ice as the technology keeps drinks “crushed ice” cold for hours without the watered down affect of ice! Place in freezer one hour or more prior to u…

Looney Tunes: Golden Collection, Vol. 1 $41.94 What’s up, Doc? Well, how about a four-disc boxed set packed with 56 of the funniest cartoons in Warner Bros. history? Get ready to laugh yourself silly with salutes to Bugs Bunny (“Baseball Bugs,” “Long-Haired Hare,” “Wabbit Twouble,” “The Rabbit of Seville,” and more); Daffy Duck and Porky Pig (“Duck Amuck,” “Dough for the Do-Do,” “Scaredy Cat,” “Duck Dodgers in the 24 1/2th Century,” and more);…

She Rides Wild Horses $3.28 Pop-country warbler Kenny Rogers’s 1999 “comeback” album features a pair of hit singles that returned him to the top of the country charts after a long absence: the lovely, sentimental “Buy Me a Rose” (featuring gorgeous support vocals from Alison Krauss) and “The Greatest,” an even more sentimental story-song penned by Don Schlitz, the same celebrated Nashville songwriter who gave Rogers his 1978…

Casper the Friendly Ghost $4.49 …

Encyclopedia Brown in the Case of the Burgled Baseball Cards $8.60 “based upon the story by Donald J. Sobol. A Howard David Deustch production”…

Encyclopedia Brown:in the Case of the Burgled Baseball Cards [VHS] $9.98 …

Nolan Ryan’s 7th No Hitter [VHS] $14.98 …

Ultra Pro 80 Card Deck Box – Red $1.15 5 UltraPro Deck Boxes – Red…