"Do you value having the original itself, or being able to tell the original apart from replicas, and if so can you split those two apart (in the way I tried to in the story) and tell me how much you value each?"

The value of both, one of them being the original, would be a lot less than the original. I'd pay maybe 40% for both. The value of just one would reduce to a small fraction. I wouldn't be interested to buy it at all. The reason is the loss of information.