Charlie Adlard's cover for The Hero Initiative's Walking Dead 100 Project sold this morning on eBay for $12,100, the most of any piece auctioned to date.

Image Comics printed blank covers for The Walking Dead #100, and The Hero Initiative commissioned 100 artists to create original drawings on them. The pieces have been auctioned online since June 4 at a rate of 10 covers a week, with the proceeds going to the industry charity, which provides a financial safety net for comics creators.

Adlard, who has drawn The Walking Dead since Issue 7 in 2004, is joined on the project by such artists as Kevin Eastman, Dale Keown, Peter Krause, Jeff Lemire, Ted McKeever, Mike Norton, Sean Phillips, Paolo Rivera, Fiona Staples and Ben Templesmith (you can see the full list of artists, and their entries, on the Hero Initiative website).