Hi..one of my consideration for DAP is a used Opus#1 along with other used models & brands. Kindly hit the link below and share your thoughts!
https://www.head-fi.org/threads/help-me-to-choose-a-used-dap.944641/
https://www.head-fi.org/threads/help-me-to-choose-a-used-dap.944641/