Special Scuba Offers like last minute deals and so on are not the norm in Cambodia. The Scuba Diving industry is small and prices are just very cheap anyway. With accommodation and food also at rock bottom prices a dive trip to Sihanoukville could make a nice little add on to a Phnom Penh/Angkor Wat vacation. If you've dived all over Thailand already, why not try somewhere a little further off the beaten path?