What was the best donation you have ever received?

Some days ago, a neighbor invited me over because she was donating books that belonged to her husband, who died from covid during the pandemic. There were a lot of books, and even by choosing only the ones which caught my attention, I was able to get over 100 different books.

It was the first donation I have ever received and I got really happy about it. I am already halfway through The Shining, which was in the collection. So it got me thinking about donation itself.

What about your experiences with it? And I am asking about donation of things, not money.