HiFi forums are a great place to learn, buy and sell audio gear.
Check out the below.
https://pretaktovanie.zoznam.sk/viewtopic.php?t=63111&start=540
https://www.hifiwigwam.com/forum/topic/111384-wlm-diva-monitors/
https://www.hifiwigwam.com/forum/profile/60638-ericlimpit/content/page/5/?type=forums_topic_post
https://hi-fi.com.pl/forum/8-sprzedam/26036-wlm-gamma-reference-dac-weiss-engineering-sprzedam.html
https://hdtvpolska.com/forum/topic/36017-wlm-gamma-reference-dac-weiss-engineering/