What's particularly annoying about this shit is the human rabies vaccine should not be this expensive. Not by a fucking long shot. It's not much different than the one used on animals and that one is incredibly cheap.
The primary point of cost is Human Rabies Immune Globulin for prophylaxis but that isn't something that's very expensive to produce itself even though the costs are higher than a basic vaccine. It was to a degree when it was only plasma derived(because you needed a bunch of people and their blood and to concentrate it) but that's not the case anymore. Monocolonial antibody production isn't as expensive as biologic medications make it seem. Compare this price to the price of a similarly dosed and sourced(though actually with less donors, look up the old news about the man with the golden arm) medication like RhoGAM at under $200 a dose and you'll find that something smells here.
Edit: and reviewing Indian costs for the immunoglobulin, the around 200 dollar price is right on the mark. But the US market is entirely disconnected from anything like economic reality.