This is not a question, as much as information! The travel agency I used for booking my visit to the Perhentian Islands, provides some inaccurate information about transport. Namely, that it is possible to purchase a seat in a shared van/shuttle bus (at a cost of 35 RM). In reality, there are no such organized trips. You have to organize a group of travelers, to use an entire van/shuttle bus or share a taxi (set price of 78 RM).