. . .of consulting an opinon aside from your own research, if you follow. Check auction sites and look through sales postings on this and other watch related websites and try to get a feel as best you can for the market for preowned Blancpain watches in general and that model in particular and you stand a much better chance of setting a realistic price. Incidentally it sounds like a lovely watch and why not hang onto it? Who knows, it could grow on you

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Jack