The following may help you have conversations with home sellers that insist on Appointments to show their home.  The information provides support for listing properties as Courtesy Call (CC) vs Appointment Required (AR) (limiting Buyers opportunity to buy).

• Homes statused CC receive 20% more requests to show than AR.
• Canceled Showing Appointments are twice as high on AR than CC (probably if an agent is    running late they decide to cancel altogether versus reschedule).

OneCall Home Showings is a comprehensive home showing service -- we have an extended hour call center that takes calls on behalf of Listing Agents from Buyers' Agents to schedule their listings' showings.  The above observations are a "back of the napkin" analysis of two dominate Showing Designations from our showing history reports.  Hope this helps convince your clients to opt for Courtesy Call (CC).