I know this post is old, but I finally found my scan of THB #1. Most of my scans are cropped so they can be placed into online cover galleries.
If I recall, this is a very thick comic which would be hard to keep in nice shape.
I may have more than one, but my comics are in such disarray it would take months to find it if so.
I've also unearthed some scans of other Horse Press item.
Promo... (I think there's a pink one also that I don't own)
Oversized
Treasury-sized items... (stitched scans)
I like Paul Pope's art, but I lost interest after he went to DC with a project.
DG
I'm bumping this to add a little to it. The pink promo you are refering to is also known as the pink ashcan or THB #69. Amazon has a pic of it
http://www.amazon.com/THB-69-Comic-Book-TNB/dp/B004NJZ8LU
At least 5 of them have sold on ebay since November. On ebay right now at least one or two copies of the other books you pictured are available. THB books are not super easy to find and you will probably not find many of them in dollar boxes but none of them that I am aware of qualify as being rare or even scarce.
I got my black and white promo and 1-4 from half price books for $ 0.75 each
Those THB books can be tough to track down. Here's a full checklist: http://tplist.millarworld.net/thb.html