i don't know of any international couriers and i'd check with DEFRA about the export reqirements, though these will be less stringent if the animal isn't going to return to the UK. DEFRA will also know the legal requirements for a reptile to enter the UAE.
cornsnakes, ratsnakes, bullsnakes, boas and day geckos
It does seem like the smart thing to do but buying one over there would be just as costly as shipping it over I would say. I had a look over there and they were pretty expensive. I also don't know for sure how long it will be till I move there :)
Be worth seeing what the market is like over there and if there's a demand. Depending on how much it'd cost, it may work out quite profitible to bring a few over.