At what point would the value of an inherited item outweigh the sentimentality?

My mum passed away last year, and I'm in my twenties. Respectfully, it's difficult to properly consider the sentimentality of an item until the person in question is actually dead. People often think they'll cling to the most expensive items, but sometimes it can be silly things that remind you of someone. I have a large can of elnett hairspray, which is obviously useless to me as a gay man with not very good hair, and has no resale value. Yet I keep it in the cupboard, and maybe once every month or two spray a bit into the air, because the smell reminds me of my beautiful and vain late mother, who took such great care with her appearance (think Hyacinth Bucket in mannerism, but prettier and with gorgeous designer clothes). If you inherit expensive items it can be difficult to weigh sentimentality versus material value. I'm a student, and one item I have is an absurdly large diamond ring from my mother. It's been professionally valued at a high price which would mean I wouldn't have to work for the remainder of my studies. Yet I know the ring was deeply valuable to my mother, so I wouldn't be able to live with myself if I sold it. TLDR: Grief is weird. You'll be surprised at how certain things are easy to get rid of, and can feel cathartic to do so, and other things are very hard to part with.