This one is free of charge to anyone happy to build and fly this 3D printed Autogyro
The main fuselage is printed in (mainly) LW-PLA and other parts printed in std PLA or PET-G
 
All information, build files and flight videos can be found here: 
https://www.rcgroups.com/forums/showthread.php?3988999-Tadpole-Autogyro-3D-Print&perpage=30#post47967981