I had thought of this as a light year, and then I reviewed all of my purchases. I'm at 22 figures, with two more in the wings (Retro Lizard and the Doc Ock/Silk 2-pack), that will put me close to $800 for the year if you include taxes & shipping.
But I'm now honestly getting to that stage where there are only a few unmade characters left I'd buy (~25). Where they get me is with new releases of core characters that are just different enough in some novel way that I feel compelled to buy them. Of the 24 I'll have bought this year, only 2 were net-new characters or new character versions (not re-dos): Web-Man and Bag-Man.