Yes, the sale of water from the Dead Sea is possible. However, there are some important things to keep in mind.
Firstly, you will need permission or a license from the relevant regulatory authorities. The Dead Sea is located on the territory of two countries - Israel and Jordan, so you will need to coordinate this with the governments of both countries.
Secondly, The Dead Sea is a unique natural site with biological and ecological diversity that needs to be preserved. Accordingly, mass withdrawal of water can upset the ecological balance.
Thirdly, the water of the Dead Sea contains many minerals that can be useful for cosmetic and medicinal purposes. But at the same time, it is undrinkable due to its high salinity.
In any case, all legal, environmental and commercial aspects should be carefully considered before embarking on such an activity.