If a holographic will, already accepted by the court, benefits a property seller, can they get the full market price when selling? Is it true that once a will is proven in court, the rights of anyone who might challenge it can’t be passed on through their own will?

Yes, a beneficiary of a holographic will proven in court can typically sell the inherited property at the prevailing market price. However, the rights of potential challengers to the will are not necessarily extinguished by its probate. If a challenge is not filed within the prescribed time limit, those rights may lapse, but they can’t be passed on through a separate will.