Sales negotiation
The buyer: "Your offer is too dear." The seller: "Dear to buy, precious in use." The word slides from "costly" to "of great value", turning the objection into an argument.
Capture the buyer's negative word ("dear", "risky") and replay it in a positive sense to turn the objection without denying it.
Turns the attack into a springboard through a lively, memorable play on meaning.
A pragmatic buyer may deem the device too clever by half and brusquely refocus on the figure.