var salePrices = ["Min",150000,200000,250000,300000,400000,500000,750000,1000000,2000000,3000000,5000000,10000000,"Max"];
var letPrices = ["Min",350,450,500,550,600,650,700,800,1000,1500,2000,"Max"];
selectInstructionType.format.sale = "£{!$price}";
selectInstructionType.format.let = "£{!$price} pw";