I agree with being able to change the price in the nursery. It would also be helpful to know exactly which plant the customer thinks is too expensive. Often, the customer hasn't walked all the way into the nursery yet when that frowny face and the red dollar sign appears in his thought bubble. When that happens, I have no clue which plant he thinks is too expensive.
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"The hardest thing in this world is to live in it." -BTVS