There isn't much of a market for Ironman accounts, but there's always someone who will be interested in an account, but you just have to remember when there is less of a market for curtain accounts, the prices will be lower than others. For Ironman accounts id say they are worth probably 20% less than non-ironman accounts.
For this account if it were ironman it would probably be worth around 40-55m depending on quests and blah blah blah