If I get anything quilty for a gift it is a gift card to a local sewing place.
My sewing room is 8 x 8. I must be very selective in what I keep. I also moved across country 1 1/2 years ago. That being said----I found great joy in gifting my excess to a couple of brand new quilters on tight budgets. Also my MD guild had a once a year event where we could set up tables with our own stuff to sell. The guild took a percentage--I forget exactly how much.
I hate clutter and keeping things I never use. Sewing machine feet for a machine I know longer have would be out the door in a New York minute.
There is one thing I gave away that I was later sorry about. Easily cured by rebuying it. It was the Tri Recs rulers and did not break the bank. No regrets with anything else. I decided not to sell stuff on Ebay or other platforms while trying to move across country. That was a good decision as the move was commotion enough.
I think once you get started you will do very well. You do not want your family to have a mess on their hands when you enter the great quilting studio in the sky.