It's a combination of "all" of that Selena. A mass email is tricky in my experience. I found that sending emails individually helps because eventually they will respond at some point. Also, this might sound cliche, but try and call them if you can or send them a text (I like to type a lot, so I try to get everything they [want to] say in writing). They almost always respond if you're either emailing and calling them or doing one or the other. If they answer the phone, keep your convo Brief and have a regular conversation about your question. You might not get them right away each and every time, just stay positive and consistent. Lastly, to answer that is: Yes, it really depends on the content of the listing, who is on it, where it is, why it's priced the way it is, etc.