Update: Frank Miller's splash page from The Dark Knight Returns sold at Heritage's auction for an astounding $448,125. Bidding has hit $100,000 for an original splash page from Frank Miller's The Dark Knight Returns, one of many highly collectible comics in a New York auction. The Batman artwork, from Miller's 1986 limited series, is being offered as part of Heritage Auctions' New York Signature Vintage Comics and Comic Art Auction being held Thursday. With an estimated value of $125,000, it's one of the most valuable pieces of comic book art to go up under the gavel in years, according to the auctioneer. "To put it in perspective, our record for a piece of comic art was that we sold the cover art for Batman No. 11, which is from the 1940s, and that sold for more than $195,000," said Barry Sandoval, who heads up Heritage's comics division, in a phone interview with Wired.com. "To think that an item from the 1980s could even approach the price of something from the 1940s is a pretty mind-boggling thought." The Dark Knight art is just one piece of comics history that on the block in the Heritage auction. Click through Wired.com's gallery to see more collectibles up for bidding, from The Amazing Spider-Man No. 2 to works by R. Crumb and Charles Schulz. Some even have prices you might -- stress, might -- be able to afford. To keep up with the comic sales, head to the Heritage site, where the floor auction will be streaming Thursday. Hat tip to ArtsBeat

The Amazing Spider-Man No. 2 This incredibly well-maintained copy of The Amazing Spider-Man No. 2, a Marvel Comics edition from 1963, really impressed the Heritage staff when it came to the auction house. It was part of a collection held by Gary Dahlberg, who died last July in a fire that consumed his home (but not the two rooms where he stashed his comic books). Dahlberg was a bus driver who had been collecting since childhood. His entire stockpile was recently valued at more than $1 million. Estimated value: $75,000+

The Uncanny X-Men No. 127: Cyclops vs. Wolverine This 1979 face-off between Marvel Comics characters Wolverine, Cyclops and Nightcrawler is an epic moment for many X-Men fans, straight from the combo of John Byrne and Terry Austin. Estimated value: $4,000+

Charles Schulz Unpublished Pre-Peanuts Comic Strip (circa late 1940s) This strip, previously unpublished, comes from the era when Charles Schulz was producing a comic called Li'l Folks and shows the kinds of characters that would end up in Peanuts. L'il Folks ran in the St. Paul Pioneer Press from about 1947 until 1950, when Schulz began producing Peanuts. It's presumed this piece was a try-out strip for his now-famous comic. Estimated value: $25,000+

Batman No. 171 Another comic from Gary Dahlberg's collection, Heritage says this Riddler-themed 1965 issue might be the most desirable DC Comics title from the deceased collector's massive stockpile. Estimated value: $15,000+

Gobbledygook No. 1 Very few copies of this 1984 comic were ever produced. Because all of them were made on a photocopier, validating various issues has proven challenging for collectors, but this one comes with a letter of authenticity from publisher Mirage Studios. Fun fact: There is an ad for a new comic called Teenage Mutant Ninja Turtles on the back cover of Gobbledygook No. 1. Estimated value: $11,000+

Dick Sprang's Batman No. 30 Cover This 1945 original from legendary Batman artist Dick Sprang is the last of the DC Comics covers to promote war loans during World War II. The image comes with a written description by DC editor Whitney Ellsworth. Estimated value: $40,000+

R. Crumb's Morse's Funnies Cover This obscure cover was created for R. Crumb's lawyer, Albert Morse, and comes from the attorney's own collection. Morse, known for his legal defense of comic artists, sued many manufacturers on Crumb's behalf for their unauthorized use of his famous "Keep on Truckin'" drawing. The artist drew this image of the lawyer when Morse asked him to create a cover for a very limited-edition comic: Morse's Funnies. Estimated value: $25,000+

Jack Kirby Journey Into Mystery No. 110 Thor Pin-Up Page This 1964 pin-up is considered by Heritage to be one of the largest images Jack Kirby drew of Marvel Comics' character Thor. Estimated value: $30,000+