Indianapolis, Indiana: Queensland paedophile Peter Truong, who bought a newborn boy for $US8000 ($8784) and then allowed men around the world to abuse the child, has been sentenced in a US court to 30 years' jail.

Truong, 36, faced a maximum 40-year sentence, while the plea deal he struck with prosecutors could have allowed a minimum of 24 years.

Peter Truong and Mark Newton (at right) with their adopted son known as Boy 1 (his face pixelated). Credit:Courtesy: ABC

US District Court judge Sarah Evans Barker, in announcing the sentence on Monday in Indianapolis, took note of Truong's willingness to work with authorities to lead them to other paedophiles and his own history as a childhood abuse victim.

Truong's domestic partner, Mark Newton, 42, also from Queensland, was jailed in June for 40 years.