I'm not as concerned about the temperament because my husband is an experienced rider. 4-6 is actually a good range for what he's looking for. He's used to OTTBs, Anglos, and Arabs. His last horse was a 9 year old OTTB.
The lack of any post-track training is a very good point. I think I will call and talk to the owner and see what this horse has been doing for the past 2-3 years if anything. He doesn't look like he's just been a pasture puff.
One thing I really liked is the stockier size as a TB. If he's really as big as the ad says, then he'll be the perfect weight/size/type for what my husband wants overall. Of course, that's a big if.
So, I'll call the owner tomorrow and ask about any training or riding since the track and see if I can get more pictures. Hopefully I can get some to help with conformation. I really wish there were more pictures that could be useful, though.
ETA: I have no intention of paying $3500 for this type of horse. I will definitely make a lower offer if it gets to that point.
The wind of heaven is that which blows between a horse's ears. ~Arabian Proverb