I've been emailing CL sellers about jogging strollers and asking several questions so I don't waste my time and theirs with an in person meeting. Here's an exchang I had with one person, selling a stroller at 35.
My message: I am interested in the stroller you have listed and have a few questions.
1. What brand is the stroller?
2. How old is it?
3. Is there a hand brake?
4. Is there a wrist strap?
5. Does the front wheel lock and unlock?
The response: "It's cheaper than all the others on Craigslist because the wheel is a fixed wheel. I'm assuming that's important to you so I'm not going to answer the other questions."
So I guess this person isn't really interested in selling the stroller?