For the home owner willing to provide full disclosure to a prospective buyer... My answer is yes.
As a Realtor? The downside of pre-inspection is the knowledge that comes along with it. Anotherwords, your Agent is compeled by practice law to reveal any condition 'known to him'; to the prospective Buyer's agent if asked.
Don't know? Can't tell!
Sometimes a bit too much information as to the condition of the property, the seller's motivation to sell, as well as marriage status, etc, shared with a Buyer, can and does often prove to work counter to the better interest of( in this case the seller) client.
Agency is complicated. Proceed with caution when providing inspection or any other report to a prospective Buyer.