Baseball cards have been around since the late 1800s and have grown into a multi-billion dollar industry. As the hobby has evolved, so too have the prices that collectors are willing to pay for the rarest and most desirable cards. While the vast majority of baseball cards can be purchased for just pennies, the very best examples in pristine condition can fetch tens or even hundreds of thousands of dollars at auction.

The price a card will sell for depends on several key factors, most notably its age, condition, and the significance of the player featured. The older the card, generally the more valuable it becomes due to rarity and historical importance. Condition is absolutely paramount – even the most desirable vintage cards lose tremendous value with any creases, corners, edges or surface imperfections. Receiving the highest possible grade from professional grading services like PSA or BGS can make a card worth 10x more than an identical one in lower grade.

Perhaps most importantly, the caliber of player depicted drives baseball card values more than any other single factor. Iconic stars from baseball’s early eras like Honus Wagner, Babe Ruth, and Ty Cobb routinely shatter records at auction due to their legendary careers and exceedingly low print runs in the 1910s-1920s. Modern superstars like Mike Trout, Ken Griffey Jr., and Mickey Mantle also have incredibly valuable rookie cards considering their sustained greatness. Even role players can yield substantial returns if their card is rare enough.

With those key attributes in mind, here is a breakdown of baseball card price ranges across different eras:

Pre-WWII (pre-1950): Cards from the earliest decades of the hobby prior to 1950 are the rarest and most valuable in the world. High-grade examples of legendary players can sell for millions. An unopened 1909-11 T206 Honus Wagner is the most coveted at over $3 million. Other pre-war gems range from $25,000-$500,000 depending on condition, player, and set.

1950s: The post-war era saw the dawn of the modern baseball card boom. Iconic stars like Mantle, Mays, and Aaron dominate values here. Their premier rookie cards from 1952-1957 Topps are worth $50,000-$150,000 pristine but more commonly sell for $10,000-$30,000. Solid role players range from $500-$3,000.

1960s: The first decade of Topps’ monopoly had lower print runs before the 1970s explosion. 1960s rookie stars like Koufax, Clemente, McCovey have $15,000-$40,000 cards. Solid veterans range from $500-$2,500 based on player and scarcity within the set.

1970s: Mass production began, but stars still hold value. The flagship 1975 Topps set has Griffey Jr.’s coveted rookie around $15,000 PSA 10. Other star rookies range from $2,000-$10,000. Solid commons are $5-$50.

1980s: Junk wax era crashed values, but stars persevered. The iconic 1984 Topps McGwire rookie leads at $3,000-$8,000. Other top ’80s rookies like Bonds, Clemens are $500-$2,000. Most commons barely $1.

1990s: Trout’s 2009 Topps Update rookie set the record at $3.9 million. Other elite ’90s rookies like Pujols, Jeter are $1,000-$5,000. Solid players range from $10-$100, bulk commons under $1.

2000s-present: Modern cards are abundant but stars still hold value. Top rookies from flagship sets in the triple digits, with solid veterans $5-$50. Most commons have little value outside of sealed product.

While it’s true you can acquire thousands of common baseball cards for just pennies each, the true high-end treasures remain quite valuable when graded and preserved properly. With smart buying and selling, it’s still possible to profit in today’s market by targeting the right vintage and rookie cards from players who stood the test of time.