Apologies for the random question, but I have this Blu Ray in my collection that I have now double dipped with the UHD version:- I have no idea whether to hang onto it or sell it. If I sell, what would it be worth? Seems to be Eur39ish on the Amazon.Fr site at the moment. Seems a lot, but do people think £30 is fair? Don’t want to under or over price etc. TIA.