> Somebody appropriates for himself a valuable piece of land with oil deposits. He prevents others from utilizing that land. Let him pay for having that exclusive rights of use, since clearly the government is providing private property related services (police, courts and army to guarantee his property) for him that others (non-owners) are not getting.
If by "appropriates for himself" you actually mean "buy", then your position basically boils down to an "all property is theft" manifesto.