Im not sure how rare they are etc. but I figure, if one has the disposable income (or if one doesn't have a wife controlling the finances) , I don't see much difference in paying over 1k for a rare vintage in excellent condition vs spending the same on a Mastro Livi or other current custom builder. Im not sure what the W&B ottoman goes for, but personally I love that razor, and would spend as much on it, if not more, than a Mastro Livi, as I know how many Livis are around, and I feel its many more than the ottoman, yet both beautiful and desirable in their own way.
Please dont think Im putting down the Mastro Livi razors, Im not, I think his razors are a work of art and hope to one day commission one for myself, just using his name/work as an example comparing going prices for new vs old.