That's a beauty! And you got it for a great price.
The Highway Patrolman is one of my favorite revolvers, they are very easy to shoot well. I have a six incher and have been watching for a nice 4 incher for a while now. Cabela's here in Ft Worth has a NIB 4 inch (still has the factory inspection sticker on the grip) in the fine gun room for $400, it gets more tempting every time I see it.