Final answer:
After a listing agreement with ABC Realty expires, the seller is generally free to list with any agency without restrictions.
Step-by-step explanation:
After a seller's listing agreement with ABC Realty expires, they are generally free to list with any agency without any restrictions. This means that if ABC Realty has an interested buyer, the seller can choose to list with a different agency if they so desire. It is important for both buyers and sellers to be able to act independently and enter or leave the market whenever they choose.