I really like the selection of both original and promotional artwork included as back matter in this trade volume (see the torrent images here and for issues 11, 12, 13 (links below) to get an impression).

Mind, that is all the added value it provides, vis-a-vis the single-issue releases.

Details per http://comicbookdb.com/issue.php?ID=256402

Peter Panzerfaust (2012) - TPB vol. 01 - "The Great Escape" Shadowline (Image Comics)

Writer(s): Kurtis J Wiebe Penciller(s): Tyler Jenkins Colorist(s): Alex Sollazzo Letterer(s): Ed Brisson Editor(s): Laura Tavishati

Cover Date: September 2012 Cover Price: US $14.99 Issue Tagline: None Format: Color; Trade Paperback Reprints/Collects: Peter Panzerfaust (2012) #1-#5