I would put an ad here and state that buyer must remove from basement. I would specify that you cannot assist as sometimes people assume that they will get a little help. Disclose all issues. If they were dirty a quick wipe down would make them present better.
I would avoid Craigslist to avoid flakes as you stated that was a concern. Some buyers on Craigslist are fine but I would start here. People who show up at your house can try to haggle but if you have good communication early on it can stop that.