Searching for the best voicemail message

I have an old landline that is used solely for internet purposes.  There is a phone connected, but not used.  And I still get calls on that phone.  I don’t have any voicemail set up, but if I did, I was wondering what message I should put on it.  My favorites, so far, are:

“Are you sure you want to leave a message?”

“Even if you leave a message, I reserve the right to ignore any and all messages.”

“Make it interesting or don’t waste my time.”