Black doors for interior are very pretty,do you have anything else black in the room ??? There is an idea book on black interior doors ,look it up and also read through the comments for more pics from houzzers who have done it...I love my black interior doors

Try Prilep doors in penshurst. They did a great job on ours - same style as bottom right.

Selling a second-hand door can be quite tricky as not all doors are the same size in width, height and thickness. The market is limited to those who are happy to make a custom frame for it as it is likely that it won't fit into a standard door frame. Despite the craftsmanship I would not expect top dollar, and would let the market decide via auction, such as Ebay. Such a pity as it has so much character, is such a conversation piece, and is not a generic door. Best of luck, Dr Retro of Dr Retro House Calls

Sorry this is the photo of house ignore the bottom red bricks as getting textured on Monday Thanks