What i want is: A normal/custom autosurf script with all addons and backdoors free, the "only diference" is in the "upgrade section"! In this script users cannot choose how many upgrades they want to buy. Let's say per example: I set the upgrade unit for $6 for 10 days, when they going to upgrade they can not choose how many they can buy, they can buy only one! When they have buyed 10 times then the upgrade double (instead of $6 now the upgrade costs $12) and then when they have buyed 10 units more of $12 it double again (now unit cost $24) and so on until it reaches a limit set by me! Please note that he can only buy one upgrade each time, but can buy the 10 units in one day and cannot buy more than 10 units in the 10 days! (This was only one example, it may not be 10 days, it may not be 10 units, so it as to be values set by me).