Talk politics.

"I am arguing that the marketplace exists and is the preresuisite for ownership (else where were those purchased), you're arguing that the ownership is prior to the markets."

Yes. Conceptually prior, in that the system of ownership is what determines how the markets operate, and prior in the sense that historically it tends to happen first.

Owned doesn't necessarily imply purchased — A lot of property titles in evolving capitalist economies are simply converted from feudal titles, the thing just becomes a capital asset in a business enterprise where previously it was an item in the family estate or whatever. (This is where you tend to get hardline conservative or traditionalist resistance to capitalism, the established landlord class or its equivalent have to go into economic competition and succeed or potentially lose property they feel is their right by birth or social status.)