This one from CB2 is $40 and it doesn't conform to FAA rules and it's not MIL-SPEC. [1]
I suspect if I wanted a limited run of soap dispensers, I was only willing to buy 300 made-to-order, tested and conformant to niche military specifications and aviation specifications, I'd probably end up paying a decent chunk more than CB2.
How much does the entertainment system in your car cost vs an iPad? Is that a rip-off, or is it a niche, custom part that has to be made from automotive grade components?
How much does the soap dispenser cost in a 777 bathroom? That's the real point of comparison, not CB2.
[1] https://www.cb2.com/ramsey-calacatta-gold-marble-soap-pump/s...