Here is a cool one that is only $6.99 shipped. Out of SDCC this year, Walking Dead had a calendar set that came with an exclusive variant. Here is your chance to grab it for less than $7 shipped!
Jesse James Comics has the Walking Dead #1 SDCC 2017 PX Calendar Variant for $6.99 shipped. That is a pretty good deal as the comic by itself has sold for up to $20. The print run on these was about 5,000 copies.
Like most of these inexpensive comics these will probably not last long.