Hey Mel,
Right of First Refusal is when you resort has the option to step in as the buyer and purchase the property for the amount agreed upon with the current buyer. Meaning that when the resort is notified of the resale, they have the option to step in as the buyer (exercise the ROFR) or to let the sale go through as normal (Waive the ROFR).
There is no set amount at which the resort will exercise, its all based on their inventory at the time. So there is no way of telling if they will waive or exercise the ROFR untill closing.