This is the hardest subject to respond to. I had to walk away from a large sewing stash for reasons of personal safety, (no longer an issue, thank you for caring) and if I had any idea, how hard it is, to replace a 35 year thread collection, I would have found a way to bring it to Oregon. I got very spoiled being able to just reach for a color and know it would be there. I just bought new thread when I finished a spool. Now, it is 6 years later, and my (thread spool) holder is still half bare. Now when I need a color, I just buy an extra of that color.
The good news is, a neighbor of mine, was thrilled in the extreme when I called to invite her over for coffee, and she arrived to learn that my stash was all hers. We filled her car twice. (She makes quilts for nursing homes.)