I will buy a OS IDS today and will try to ID it to see if a gold value will show up. I think that is not working. These are not able to be identified again like the other non value items from the mentioned quest. I also think a OS IDS can't be sold to merch for that reason. I will be back home in ~4 Hours and then I can try to gather some knowledge about the topic. Thanks for help so far
PS: maybe someone has a OS IDS atm and can try it and bring some enlightment in the darkness?