In researching values of international slots (it's all over the place, peaking at 175K), I found this gem:
In February 2019, DC bought an inter slot from Portland for 200K:
The Portland Timbers today announced that the club has acquired $100,000 in Targeted Allocation Money (TAM) in 2019 and $50,000 in General Allocation Money (GAM) in 2020 from D.C. United in exchange for a 2019 international slot.
In August 2019, DC sold an inter slot to Minnesota for 50K:
Minnesota United announced today that the club has traded $50,000 in General Allocation Money (GAM) to D.C. United for an International Roster Slot for the 2019 season.
Hamlett might not have a clue, but at least he didn't do that...