What can a country in debt sell or trade example a (territory) as payment?

Like in Canada can we sell the Yukon, and in the U.S. can sell a Hawaiian Island to China? Or to the highest bidder. What in your options for making money to pay off your home countries debts with its own assets?

Or to sell advertisement space on our members of Parliament’s office suits while on Cpac/C-span.

Humor welcome.