If you are using the 'aircraft bluebook', their prices seem a little light. Helivalues seems to be more in tuned with current helicopter prices. For the price range you state, about all you will find are runout projects. There appears to be no price difference between the A models and the B's. Considering what the new ones are going for, the market is pulling the prices for the older ones up with them.
Keep looking, there are a couple of descent B's out there on the market right now. Study the component times carefully, you will always find one to two items that are getting close to timing out. If you pick the right helicopter they will not be too expensive. Also remember what they are asking for is not what they will accept. I am in the same market right now and am looking at a B or early C model.
Good luck.