yes i forgot my bank pin so i tried the poissible numbers it could be after about the 6th one im pretty sure i got it. But no it says please try again, then wait 1 minute, then wait 5 min then wait like 10 or an hour i forget.
of course you will get different prices because someone tells you the correct price then some stupid n00b gives you the wrong price... but i dont know so do what kaaskop said