Just got the same call!  Glad I'd checked it out before calling back!!!

I placed a paid aircraft for sale ad in a leading publication and someone name Dan from this number called. I suspect he saw my ad in the publication. He didn't say what he wanted on my answering machine, and he didn't really sound like the pilot type to me. I suspect he was going to try to sell me some service related to the ads I already placed.

It's a call about a car you have advertised for sale (in my case, it was on Autotrader). Look at the entries for 1-866-771-1745 for more information.