Sorry for delay, was searching for messages codes so it will look more realistic

(not tested but should work)
PHP Code:
#include <amxmodx>
#include <cstrike>
#include <fun>
#define VERSION "0.0.1"
new price = 300
public plugin_init() {
register_plugin("SmokeGrenade Price Change", VERSION, "Jhob94")
register_clcmd("sgren", "Buy_Smoke")
}
public Buy_Smoke(id)
{
new cur_money = cs_get_user_money(id)
if(cur_money < price)
client_print(id, print_center, "#Not_Enough_Money")
else
{
if(user_has_weapon(id, CSW_SMOKEGRENADE))
client_print(id, print_center, "#Cannot_Carry_Anymore")
else
{
give_item(id, "weapon_smokegrenade")
cs_set_user_money(id, cur_money - price, 1)
}
}
return PLUGIN_HANDLED
}
__________________