The financial pain of buying a high end film camera that was four digits body only in 1993, and seeing that drop in value to almost nothing in age of digital, sort of makes the pain of a digital devaluing pale some-what, but...
Question shuldn't be what's it 'worth' but "did I get my money's worth?"
If "yes", then why feel guilty or irked if you stick it on top of the wardrobe, in the display cabinet, in a charity shop or even in the bin?
Do you keep ear-buds you have only used one end of, or expect some-one to buy them? Its not a LOT different.
As to sentimental value? Have to dsagree with Dave a little on this one.
My Olympus XA2 was my first propper camera; very mucha tool, it's much battered and abused, and has rather horrible scratch on the lens now. It sits on the shelf as a keepsake, and memory of all the places we went together in my youth.. its not worth repairing, and I couldn't bear to bin it, so what the heck?
Gifted so many other's over the years? I have the camera my Granddad used for his wedding photo's seventy years ago, as well as the one he took most of the pictures of my mother and uncle and aunts and even me, in our childhoods; I have the camera my other Granddad took his holiday snaps with when I was a kid; I also have my Gt Uncle's camera.. among the many.
Ignoring the fact they are camera's, they are all personal items of family members long past, ones I can identify with and appreciate, and occasionally use... I expect I will end up with a couple from my own Dad and maybe other's before my time's up, and that ultimately it will be down to my daughter what she does with them.... with chance that as a snapper she might keep them like I have, keep-sakes she can use....
If of course, she can still get any film for them, and electrickery in the widgetal ones hasn't died, batteries still take charge, and 'something' can still read the memory cards!
But I suppose many, may hold as little sentimental value to any-one, as the collection of cafe sugar-cubes my grand-mother left in her bed-side draw when she died!
WHY she kept them, is a mystery! She didn't take sugar! She was diabetic! But she was loath to throw anything away, and insisted, she had 'paid' for them, so couldn't just leave them on the saucer, and they 'might' come in useful!.... I think it must have been one of those 'War' things, that afflicted that generation..... But still.
Why you choose to keep, or not, a camera, or anything else, even a collection of cafe sugar cubes is up to you at the end of the day.