uppköpa bedeutet auf Englisch

acquire [acquired, acquiring, acquires]▼(to get)
verb
[UK: ə.ˈkwaɪə(r)] [US: ə.ˈkwaɪər]

buyer [buyers]▼(person who makes purchases)
noun
[UK: ˈbaɪə(r)] [US: ˈbaɪər]