If you have the money etc and it isn't causing anyone any problems then feel free to buy away.
I have a modest collection that has slowly grown. However I do use everything in there and the things not being used get moved on. Unless you're a collector, I personally think moving on what you don't like or use is the way to go.
I need to look at my razors that aren't being used, but I only have 4 soaps and have decided on a few manufacturers that I prefer. Having said that I do want to try more.
I've never tried a badger brush so have avoided that... but I do want to try one at some point.