In nearly all situations, I suspect, lying to yourself only appears profitable because the situations has been misinterpreted. It would help to have more contextual examples where lying is plausibly profitable.
The realtor example is too ambiguous. At best, lying gives me a greater probability of capturing more of the surplus from trade, but at the risk of no sale at all (e.g. the best offer falls between my real and stated minimum). Moreover, the scenario construes sale as buyer vs. seller, but my best hope to get a high price is with competition among buyers rather than negotiating in a zero-sum game with one buyer. Here, a truthful realtor might help, because buyers would believe him when he says someone else has made a better offer.