Shipping is set per auction
Some auctions ship and some are pickup-only. Whether shipping is offered, who arranges it, and what it costs are all set by the auction company running the auction, and listed in the auction's terms. Check before you bid if you can't pick up in person.
Titled items
For vehicles, trailers, and other titled items, the auction company handles how and when the title transfers, along with any paperwork and fees. Title timing can differ from when you collect the item, so read the auction's terms and ask if anything is unclear.
Ask the auction office
Before bidding, use the auction company's contact details to confirm shipping and title arrangements. After a purchase, choose Contact auction office on your purchase or invoice and read replies in Messages.