A number of sources define "magbili" as to sell (versus bumili = to buy). E.g. this is the definition of "magbili" in the dictionaries of Carl Rubino (2002) and Leo English (1986). There are also sentences with "nagbili" in this sense in
Schachter & Otanes (1972): A Tagalog Reference Grammar
J Donald Bowen (1982): Beginning Tagalog: A Course for Speakers of English
Tsunekazu Moriguchi (2005): A typology of languages
E.g. Moriguchi translates:
nagbili si John ng mansanas = John sold an...
magbili / nagbili - buy or sell?
Schachter & Otanes (1972): A Tagalog Reference Grammar
J Donald Bowen (1982): Beginning Tagalog: A Course for Speakers of English
Tsunekazu Moriguchi (2005): A typology of languages
E.g. Moriguchi translates:
nagbili si John ng mansanas = John sold an...
magbili / nagbili - buy or sell?