I own three mechy keyboards (red, blue and black), and about to get a brown. They are addictive yes, but are they worth 100+ dollars?
It depends on how much you type and what keyboard suits you best. I'm using a cherry blue for typing, and use black/red for gaming. I also own several decent rubber dome keyboards and to be honest, they work just fine.
I think it's hyperbole when people say things like mechy keyboards are life changing or something silly along those lines. Typing with Cherry blues, I definitely noticed that I have started typing faster. But I'm a terrible typist so with increased speed means more error. So it's give and take.
I bought all of mine for around 50 dollars. If you are looking for a keyboard to get you started, wait until they go on sale for around 50-60 dollars. At that price point, I think the cost is well justified for something who is on the edge. Later, you can upgrade to Ducky line or Das line mechy keyboards.