most of the time, if the catalog give a price for UNC, but nothing lower, then the value for those lower grades is usually face value, or current exchange rates. This isnt always the case, but usually
As De Orc stated, the prices he gave were for notes in UNC grade. Your notes are not. So if you sold then at a price point of UNC, they wont sell, and will sit there for 6 months
The site DOES have a way to donate
the way i know of is to become a 'supporting' member. I would have to look around for the link as its been a while since i did it lol De Orc might know .. hint hint
If there is another way to donate, i am unaware of that method.
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