I'm so sorry for the loss of your sister. I know it's difficult to decide what to with a loved one's belongings & you don't have much time.
Fortunately, I have never had a very large stash & have only a couple of UFO's. I generally just purchase what I need for the project I am currently working on. Oh, don't get me wrong, I still have plastic bins with scraps & fat quarters but that's about it. DH would probably sell my machine(s) on Ebay or have my DD do it for him. Since she is not a quilter, she probably will not be interested in my scraps.