I’ve got an Allo DigiOne Signature with Raspberry Pi 4 (in the black acrylic case) and the Shanti PSU (the best you can get for this setup). I’m upgrading my amp to one that’s Roon Ready so I don’t need this anymore. Only a year old and barely used. $300 + shipping. US based, but will ship overseas.
EDIT: Includes the SD card with Ropieee and a Blue Jeans Digital Coax cable.