I really can't tell from that photo, I don't see a sway back at all, just the angle makes it look that way. His pasterns look upright but he has nice legs and is in good condition, nice neck maybe, pretty head. Wondering why he's so cheap??? Health issue, training problems, ??? I would for sure get a good look, he looks kind with potential as a great trail horse or whatever depending on training and soundness, for a family horse the price is wayyyyyy off but at least take a look! Could be the steal of the century!
If you don't want another horse or are looking for something specific....
He's the most butt ugly horse I've ever seen! Terrible plain sorrel, that looonnggg tail makes me sick, I hate buying a healthy looking horse, I'm all for a project and wouldn't take a family horse no matter how cheap! LOL!!