Not defending the guy, but if you've posted on CL lately you know that the 'BS' is very deep. I get tons of emails, some sounding very specific - Hi, I'm interested in the bike, can you send some high res pics?
You send some add'l info and you get a response about how I'm not interested now but did you know you can make thousands from home yadda yadda yadda.
So although there's no excuse for poorly written ads with a bad attitude, I can see how someone not particularly savvy might get frustrated with the whole experience.