BATMAN/SUPERMAN #5 – German Lee Bermejo Cover
Reprints: Superman / Batman # 9, 10
Limited to 1000 copies
Published for Comic Action Con in 2004, this issue features a beautiful Lee Bermejo cover.
Relatively easy to find out, a quick search on eBay says that it's somewhere around the $20 area.
A cheaper alternative might be Panini France's Superman #20 variant which sports the exact same cover and was published in 2007:
A great shor of the trinity by a terrific artist, what's not to like?