Is this case for a white featherweight?
 

Because otherwise I can't figure out why it's so expensive.

https://www.shopgoodwill.com/Item/91499667

Not according to https://singer-featherweight.com/blo...herweight-case
But evidently, they might think so. According, to https://www.novamontgomery.com/singe...weight-221.htm the cases for featherweights are approximately 13” x 8” x 12” although there were some variations. That one is larger like the portable bases are close to 18" wide.

Janey - Neat people never make the exciting discoveries I do.
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My mom had a white featherweight and it came in a green and white square/rectangle case like the black one pictured. I have never seen the newer case pictured.

Looks like it might be for a tan Featherweight?

I just don't think so! Maybe for a different model sewing machine. Of course this question could better be answered by someone who specializes in FWs.

Obviously, someone thinks it's a featherweight case. It almost can't be. It has none of the built-in things that a featherweight case has, like the place for the shelf. To my eye, it appears to be a sewing case.
Back in the olden days, Singer Sewing Centers carried lots of stuff. The one in our shopping center was like a fabric store that sold sewing machines. They sold patterns, zippers, thread, books and I would guess --- Sewing boxes.
bkay