I have a silk Burberry Brit jacket I’d like to sell but I can’t find comps to price

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Any help would be appreciated. It’s Burberry Brit, silk outer, poly interior but the check color way inside is dark purple, red and black (vs tge classic tan red black) and I’ve not seen it before but I know they do vary the colorway. I just don’t know where to price it. Women’s xl black diamond quilt