A good broker will find them all over the world. Don't be surprised if they point you towards one from Ireland or Greece. These countries are examples of economies that are struggling somewhat and I have seen a very cheap AS350 come from Ireland. Good condition too. I have heard of others as part of a fire sale.
Now please don't flame me for using Ireland and Greece as examples, and I am not saying they are the only place with cheap aircraft, it's just a personal observation recently, I wish both countries an improvement.
Think about what you want to do with it. Sounds obvious, but a B3 will cost more to run than a BA/Sd2, so if you are only private the B3 might be too expensive to run. Although if you can find a B3 at 1.2 M then please let me know...
