[System64]

try this

pawn Код:

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    if(dialogid == 3)
    {
        if(!response) return 0;
        switch(listitem)
        {
            case 0:
            {
                SetPlayerAttachedObject(playerid,2,19078,1,0.320722,-0.067912,-0.165151,0.000000,0.000000,0.000000,1.000000,1.000000,1.000000);
                SendClientMessage(playerid, 0x00FF00FF,"You have bought a parrot!");
                GivePlayerMoney(playerid,-20000);
            }
        }
    }
    return 0;
}

COMMAND:buyitems(playerid,params[])
{
    if GetPlayerScore(playerid) >= 0)
    {
        ShowPlayerDialog(playerid, 3, DIALOG_STYLE_LIST,"Buyable items","Parrot = 20000$","Buy","Cancel");
    }
    return 1;
}