Probably not.
Bazaar Trader won't help you regain control of Humble Defector, if that's what you're asking.
Bazaar Trader's ability can only target permanents you control and target legality is checked both when you activate the ability and when it should resolve, hence, even if you choose yourself as the target player, you can only use it to gain control of a permanent you already control (it's handy to prolong temporary control effects such as Act of Treason, but you can't use it to take back a permanent you gave to another player.)
Figured as much but felt like asking anyways just to be sure. Thank you very much for your help!
Guilds of Ravnica - Commander 2018 - Core 2019 - Battlebond - Dominaria - Rivals of Ixalan - Ixalan - Commander 2017 - Hour of Devastation - Amonket - Aether Revolt - Commander 2016 - Kaladesh - Conspiracy 2 - Eldritch Moon - Shadows Over Innistrad - Oath of the Gatewatch - Commander 2015 - Battle for Zendikar - Magic Origins - Dragons of Tarkir
Green - Blue - Red - White - Gold
Figured as much but felt like asking anyways just to be sure. Thank you very much for your help!
Guilds of Ravnica - Commander 2018 - Core 2019 - Battlebond - Dominaria - Rivals of Ixalan - Ixalan - Commander 2017 - Hour of Devastation - Amonket - Aether Revolt - Commander 2016 - Kaladesh - Conspiracy 2 - Eldritch Moon - Shadows Over Innistrad - Oath of the Gatewatch - Commander 2015 - Battle for Zendikar - Magic Origins - Dragons of Tarkir
Green - Blue - Red - White - Gold