The answer is simple, there is a few places to buy paintball marker in Dubai. Sharjah Paintball Park sells paintball markers at an inflated prices, the reason these markers cost so much is due to supply and demand.
With little to no competition in the country for the sale and distribution of paintball markers it is easy for them to inflate the price as people are willing to pay it.
Sharjah Paintball Park sells brands such as Dye, Empire, Planet Eclipse, BT Combat and Tippmann.
There used to be two stores in Dubai run by players, for players that sold paintball markers and other products for a very reasonable price. One of these stores was Preface Paintball, it was located in Umm Ramool. The other was Xtreme Depot, both of these places sold paintball guns in Dubai but have since stopped business.