[Konstantinos]

No, no.. on the /sellsteel command, replace:

pawn Код:

if(sscanf(params,"ud",id,amount,price)) return SyntaxMSG(playerid, "/sellsteel [playerid/PartOfName] [amount] [price]");

with:

pawn Код:

if(sscanf(params,"udd",id,amount,price)) return SyntaxMSG(playerid, "/sellsteel [playerid/PartOfName] [amount] [price]");

You forgot to add the last "d" specifier so price stays 0.