<?xml version="1.0" encoding="utf-8"?>
<ReviseFixedPriceItemRequest xmlns="urn:ebay:apis:eBLBaseComponents">
    <ErrorLanguage>en_US</ErrorLanguage>
    <WarningLevel>High</WarningLevel>
  <Item>
    <!-- Enter the ItemID of the fixed-price listing and the information you want to revise -->
    <ItemID>XXXXX</ItemID>
  </Item>
</ReviseFixedPriceItemRequest>