maybe a society which has laws and regulations voted by citizens (anarchy for example) commercial products shouldn't profit over 700% or some absurdity which caps the 5000 usd number

No problemo. The consequence of that law is you'll simply not get those products on the market because there's not enough profit to justify someone spending the time to make them.

See also: Rent control, minimum wage, price control (e.g. maximum price of gasoline during a shortage).