Property managers are generally not incentivized to cooperate during a sale process when one of their fee-managed properties is being sold, particularly for their clients who only own 1 property. Many times, they end up losing the account to the Buyer's existing manager or in-house management team once the sale is consummated.
As such, I find that they can be slow to respond with access, providing Books & Records, answering questions etc.
I did however recently work a transaction where the existing manager was incredible through the sale process for one of his fee-managed properties. Knowing there was a good chance he would lose the account, he still responded immediately to calls/emails, showed up personally & even early for tours to make sure the property looked good, and demonstrated an expertise for the building and market.
His professionalism did not go unnoticed. The Buyer not only retained the manager for this building, but also engaged him for 7 additional properties.