Hope you found your D80. If you get the one from Les, it will be a good running machine.
I have one now residing in the kitchen awaiting a resto.
Anything put on CL for 'free' will be like a chicken thrown into a pool of piranhas.
The vac could easily been picked up by a scrapper or a construction worker needing a disposable vacuum. Or the poster gave up.
I made the mistake of doing this once with a DLP TV.
After a month of being listed on CL for $5 with no responses, I offered it for free. Dozens of time wasting emails and texts. Rarely a response back and lots of "I'm coming now' BS. People were clicking on everything in the post trying to lay a claim on it, including the 'report this post' button which resulted in the takedown of the post.
In the end I ended up trashing it. Never again would I offer anything for free on CL.