Worth remembering that a car's value is also determined by condition.
Some of these are absolute dogs with lots of bodywork issues.
There's probably a reason why the 2010 IS-F you mentioned being the cheapest, is the cheapest and has not been snapped up yet
It's mostly because people looking for an IS-F know what to look out for and are usually car enthusiasts - hence, if they spot something odd, like most car enthusiasts, they'll give it a miss.