In the new HBO documentary Robin Williams: Come Inside My Mind, Billy Crystal, fellow comedian and decades-long friend of Robin Williams, opens up about his bond with the late comedian, including a series of voicemails that I'm leaving you this message because it's the fastest way for my heart to reach yours. We can't take your call right now, but please leave your name, contact information, and the reason for reaching out, and one of our team members will be in touch within 24 hours.
Also, during your script video, you stated that your postcard mentions that the seller's initial call will only be answered by an automated service, but on the “Here's one of Our Favorite Postcards” screenshot, the actual verbage is, “Call [this number] and I'll be happy to talk with you. If I'm out, please leave a message and I will call you shortly.” [no mention as to why you'd call anybody “shortly”, but that's prolly not the hill i wanna die on right now].

Another way to make up funny voicemail messages is to act like a device has come alive. For instance, you could say,"Hello, I'm Bob's hair dryer, and I've taken over because I'm way more interesting. If you'd like to leave a message for him and have your hair dried at the same time, just hold up the phone." Answering like an answering machine, a microwave, or refrigerator and using the functions of that device in the answer are easy ways to create a fun voicemail.
These work voicemail greetings are for the work phone that you and only you use. They’re highly effective because they help you establish a relationship straight from the voicemail. Or they help you share an important update in a simple, straightforward way.