Does it look to anyone else, that his dwarf Mini, looks as though he has a saddle mark on him? I also wonder, if they are telling prospective buyers, the full details of the vet costs, this little fellow will likely need throughout his life. I hope so. Hopefully, they will be incredibly careful, as to the home they place this dwarf in. In other ads, they also have this same dwarf, advertised for less cost.
When Miniature Horse breeders produce a dwarf, they are ultimately responsible for it. Placing such horses correctly, is an extremely difficult task.
Looks as though they have very nice fencing, but with a (maybe) llama or something else, along with several others in this space.
Just hope this little fellow, find a really good and knowledgeable home.