The History of #FoilFever:
The Walking Dead (TWD) Foil Fever started back in 2004 with the Image Vol 1 Retailer Incentive Hardcover (shown in the photograph). These were sent out to comic stores to promote the release of TWD Vol 1. We believe they were a limited edition of just 500 (LE500). According to Shawn @bigclutch Kirkman's Facebook page, "These are very rare".
There have also been Chromium comics, such as one of the x20 TWD #100 variants and the Mexican La Mole Comic Con 2019 ed