Why are pcb's for gas boilers so expensive? They have smaller number components than computer motherboards which are very cheap.

They have smaller number components than computer motherboards which are very cheap.
We own fiberglass pool stains that hold reoccurring?
Answers:    Angel have it exactly right. The PCBs are specific to each manufacturer/model of boiler. The capitalist therefore have a captive marketplace and can charge what they like as you can't capture the part anywhere else. It's call having a supply monopoly.
My outside faucet will not turn on?
The price will be what the souk will bear.