[antonio112]

You need to loop through all your houses and check if any of all houses is for sale:

pawn Код:

#define MAX_HOUSES 100 // Here you insert number of houses you have

for (new i = 0; i<MAX_HOUSES; i++)
{
              if(HouseInfo[i][Owned] == false)
              {
                           // the dialog here
               }
}

Hope that gave you an idea about how you should do it.