What does it mean when it says SEND TO ONLINE AUCTION AFTER LISTING AS A FIXED PRICE AND YOU AND Y

[mpetronella]

IF YOU LIST AS A FIXED PRICE AND WANT TO AMMEND THOSE INSTRUCTIONS TO AN AUCTION STYLE LISTING AND IT SAY "SEND TO ONLINE AUCTION"  BUT IT SAYS YOU HAVE TO LIST AT $19.99  WHEN SAY THE ITEM IS $250  hOW CAN i AMMEND THE $19.99 TO A HIGHER FIGURE?