Should it stay or should it go?

I've been mulling over whether or not I should Ebay this jacket for a while. It's vintage and I would guess from the pretty silk satin lining and beautiful finishing that it dates from the 1950s. I'm not sure what the fur is: it's very soft but incredibly thick & heavy, so I think it may be shearling.

I love the glamour of the fur behind my head when I raise the collar, but I fear it's too boxy a shape on me, unless I drop two sizes and that's a pipe dream. As I've only worn it twice in a year, & space is at a premium here, I think it should probably go.