If you’re not riding it, and can’t see that you ever will, just get rid.
I’ve held onto things (for a decade or more) for sentimental reasons and all that happens is they sit there dropping in value and slowly becoming of no use to anyone, until you find you can actually bring yourself to get rid cos you’re sick of them cluttering the place up.
If somebody’s offering you a good price, take it and spend it on something else you’ll actually use.
If it helps you come to terms with it, a bike is meant to be ridden, not sit in a garage. So let someone have it who’ll use it as it was intended to be used.