I clearly remember paying around $80 USD for a WholeTomato [1] license back in 2003 for C# when I first came out of University into my first job. And that was a glorified auto-completer.
Software has turned really cheap. The downside of is that it is almost a commodity, but the development effort has not really decreased correspondingly.
[1] https://web.archive.org/web/20030618043241/http://www.wholet...