public static string highPrices(int [] value)
{
    String str = '';

    for( int x = 0 ; x < 5 ; x++ )
    {
        if( value[x] > avg )
        {
            if( str == '' )
                str = value[x];
            else
                str = str + ", " + value[x];
        }
    }

    return str;
}