First you will want to find out why his relationship failed, how long he has been divorced and if he is actually fully divorced.
Maybe in more ways than one, but he definitely has real-world experience and the benefit of the 20/20 hindsight vision you won't have for years.
Without the pressure of all that, there's a lot more time and room in a relationship to actually be in the moment and enjoy getting to know one another without feeling preoccupied by future expectations. He has a couch instead of a futon, there's more than beer in his fridge and you aren't likely to have to forage through his bathroom in search of something that resembles toilet paper.
Aside from the whole divorce thing, he's likely to have his life together (and if he doesn't, run).
Let's give him the benefit of the doubt and say he learned from that mistake, but he's still not in the category of divorced guys we're talking about here.
So, yes, the divorced guy you should date is oldbut that's actually one of his finer qualities — it means that he's more likely a man.