I have bought a brand new B&O Serenata mobile phone for 450,-€ today on ebay. Is this a good price?

Were there any updates made to Serenata models?

Is it possible to change the part of the housing wirh brand names Samsung and B&O with a new part where only B&O brand name would stand on? I have red that last phones were released with only B&O name on the phones.

Does somebody know how much would an original leather case from Levis Vuitton for this phone cost? Are there different colours available or only one orange/brown?