BMP files wont work with JPEGsnoop matey. But your correct, that is the earliest copy of the same image, so you can let KR4-GTR off the hook here as this proves he's definately not responsible for the editing.
JPEG exif and IPTC (the data which jpegsnoop reads) are manipulated very easily. You shouldnt rely solemnly on a freeware program such as jpegsnoop to determine the authenticity of an image (as clearly demonstrated in this thread) as there are also other factors to take into account.
I've run the image that KR4 posted and the output demonstrates that it was edited. The edit steps were around quality being changed from '12' down to '9' and conversion to JPEG. The hue etc should be disregarded as its nothing but the slight standard adjustments which occur when you resave an image with less quality. Any other edits in question were not made at the same point that the quality / file format was changed.
I've assessed the other image where the car looks normal with some of my programs from work and it comes back as uncertain if processed or edited, i was under the impression that jpegsnoop would also pick this up. I'll look into this further but if this is the case, it looks like someone's probably played with the EXIF's.
You shouldnt rely on jpegsnoop because you can easily edit or clear EXIF and IPTC data from any jpeg imagee with a large number of programs. Just google it and will find lots of them to either customise or even return the data to a stock generic template for example olympus or canon cameras (which is the easiest way to do it). I know this because I edit them when I shop my pictures and add copyrights - etc. I've found with some images if you do edit this data or use one of the common templates - it will make it a 'class 4 file' which means it is uncertain if processed or original. If this is the case then this should explain this other picture where the car looks normal.
As night falls, its a goose chase, you cant determine from the image who edited it, but the date stamp of that file above makes me believe its the seller, as the main creation and edits made to the original BMP file were made on 04 December 2009. way before any of this conversation begun.