In many cases it makes more sense to save the money, and if needs be, knock that amount off the asking price. The overall cost to the buyer is that way the same, but at least they get a kitchen etc of their choice.
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Except that in a slow market the savvy buyer [1] will also want money off for the inconvenient of waiting for it to be done.
tim
[1] which I accept doesn't include most FTBs