I got caught by that too initially and was trying to work out if Sky Safari Pro 6 was 42.99 US or AUD. Its not the best price it has been ($30.99) but better than the $62.99 AUD it was advertised at. I like the details of targets and some background history in it and have used it for observing. I got the Pro version as you can drive mounts with it. I also like reading the details and having a play especially if the weather is not good so I can plan and be ready for those moments when seeing is good
The other versions look great but wished to have the full package this time (and also have Stellarium Plus as I really liked the older version I had used for a few years that was free I think at the time). Sky Safari is pretty pricey for what it is and Stellarium in my experience and IMHO is a great program for astro (and cheaper!).