Everything seems sort of pricy to me these days but I am sure you are going to be able to find something cheaper. Like the 350 legend, I don’t see it being a ground breaking round for me but I have had a 357 Maximum rifle for years and it too, doesn’t really do anything I need, so if I get one or both of the others it will just be a step towards “at least one of everything”, more than something I could really use.
Not to mention, I am not real sure when the last time I purchased factory centerfire ammunition. A number of my centerfire firearms have never even fired store bought ammunition.