You've heard stories of comic books — like the first appearance of Superman — selling for millions of dollars at auction, so you know comics can be worth a fortune. Now that a Guardians of the Galaxy movie is coming out, the comics that the film is based on are surely going to be a hot commodity, right? We wondered: If you had been collecting Guardians of the Galaxy comics from the start, way back in the 60's, could you now cash out and retire to a small (monster) island and live out your days like Tony Stark? Here, we take a look at the prices of several key issues from the Guardians' past to find out: Marvel Super-Heroes #18 (January, 1969) Cover Price: 25 cents Current Price: $380 Notable Because: It's the first ever appearance of the Guardians of the Galaxy. Yondu on the Screen Fun fact: The only character from the original lineup in Marvel Super-Heroes #18 who made it into the movie is Yondu, played by Michael Rooker of The Walking Dead fame. Marvel Presents #3 (February, 1976) Cover Price: 25 cents Current Price: $14 Notable Because: It's the first time the Guardians had a dedicated run of their own; it's not their own title yet, but it's progress. Guardians of the Galaxy #1 (June, 1990) Cover Price: $1 Current Price: $3 Notable Because: The Guardians finally get their very own title, 21 years after first appearing. Marvel Preview #7 (Summer, 1976) Cover Price: $1 Current Price: $30 Notable Because: It's the first appearance of fan-favorite Rocket Raccoon. Introducing Rocket Raccoon Marvel Preview #7 was an anthology comic, and Rocket's first appearance was in the story titled "The Sword in the Star! Stave 2: Witchworld!" (Yes, the exclamation points are in the original title.) Unlike the tough-talkin', gun-totin' raccoon he is in the film, originally he was a classy guy with an English accent who ... loved the trees? Rocket Raccoon Limited Series #1 (May, 1985) Cover Price: 75 cents Current Price: $4 Notable Because: It's effing weird, and hard to imagine how it ever got green-lit. Hellboy Raccoon The Rocket Raccoon Limited Series was penciled by Mike Mignola, who would later go on to create Hellboy. It also gave Rocket the space-buckling, guns-a-blazing persona that we know and love. Tales to Astonish #13 (November, 1960) Cover Price: 10 cents Current Price: $425 Notable Because: Created by Stan Lee and Jack Kirby, it's the first appearance of Groot, a living tree-man who joins the Guardians. I AM GROOT! Over the last 50-or-so years, Groot lost the ability to say anything other than "I AM GROOT!" For the movie, Vin Diesel has the unenviable task of making that one line of dialogue mean many different things, through inflection. Marvel Preview #4 (January, 1976) Cover Price: $1 Current Price: $20 Notable Because: The first appearance of the film Guardians leader, Star-Lord. Star-Lord After a run of stories in the late 70s, Star-Lord vanished from the Marvel universe for over 30 years, until 2004, when he was brought back in the comics to ultimately form the new Guardians of the Galaxy team. In the film version, he's being played by easy-on-the-eyes Chris Pratt. Buying each of these milestone issues at cover price would have cost you $4.35 over the years. Now, they will set you back (or fetch you) somewhere in the ballpark of $876. If investing isn't the reason you read comics, then we're not sure you heard us when we said that the first Superman comic sold for millions of dollars. But, if you did and you're still only interested in the stories, then your best bet is to pick up each and every one of the above titles as a digital version, direct from Marvel.com, where they'll run you $1.99 each. Look! We just saved you $863.07! Ooga-Chaka. All prices are for Near Mint condition as listed on ComicsPriceguide.com.