I have just re-started flying a very well equipped Warrior which is an ex commercial flying school example. It is fully IFR (except de ice and oxygen of course) and is a very good platform for IMC training. We of course have the IMc rating in the UK to justify the kit
I don't think airframe hours makes a huge difference; the key thing is that the log books are up to date and it has had its first EASA ARC issued, so that all those expensive items which needed replacing or inspecting/overhauling have been dealt with. To my mind the better the instrumentation the better the value.