It’s back again! It looks like four copies of the Canon EOS-1D X Mark III (with CFexpress card and reader) is now in-stock for $6499.00 at the Canon Direct Store.
This body has been very hard to find in-stock, and only a small quantity has been made periodically available.
If you’d like to be notified by e-mail when stock is available in the future, you can signup for a notification on the EOS-1D X Mark III page.