Buying Ritchie Bros Equipment "Not in Yard"

Looking through the upcoming auction, most of the pieces I am interested in are not in their yard and it is only about a week away. What is the deal with these sorts of units? Do they expect to have them in the yard by auction time or is it a pig in a poke? Very sketchy information except for model and serial.

Buying Ritchie Bros Equipment "Not in Yard"