He looks alot like Biscuit did when I got him. Biscuit was underweight and his neck looked almost exactly like that.
Biscuit was 9 years old when I got him, gentle but had been harshly handled and we worked through his fears - this horse doesn't seem to have that handicap which is nice. He looks like he toes out on the hind right foot and could use some muscles!!!
Biscuit's sire is a grand champion horse but Biscuit's papers were never sent in. I have the breeder's certificate and could register him but since he is a gelding and I don't show - I don't care. Biscuit is a very nice looking palomino like this boy - pretty blaze down his face and white mane and tail but you can't ride color!!! And keeping a palomino clean is a pain in the patootie!!
I can say this - I paid $1500 for Biscuit and it really was a bargain. He is gentle, sane and safe. He was and is not perfect but a steady fellow on the trails. He had hogs run out literally from under his feet last year and didn't do much more than flinch.
Depending on what you want to do with this horse should be your guide to what you would pay. I can say that $5,800 couldn't buy Biscuit now but $1500 was my limit when I bought him!!!
You can go see him, try him and make an offer that you are comfortable with. The ad says good bloodlines but he didn't say what they were.