The metadata element ows_IsCheckedoutToLocal and ows_CheckedOutUserId contain the information on check out status. SharePoint Collector will still export the item.
Example:
- Not checked out (checked out value is 0 and no username is present)
ows_IsCheckedoutToLocal="5014;#0 ows_CheckedOutUserId="5014;#"
- Checked out (checked out value is 1 and a username is present)
ows_IsCheckedoutToLocal="5014;#1 ows_CheckedOutUserId=" 11;#USERNAME"