Okay so I used to hobby often enough to know what was going on. Haven't really in a few years but occasionally I will look the market over and make inquiries.
What I've run into a few times is a ridiculous attitude and blow back from some providers when I'm not right then booking a meeting.
I just don't see anything wrong with inquiring about donations, location (as in what part of town, nothing specific)availability, etc. Especially when there is little to none information in their posting.
Now admittedly I'm not looking on Tryst or higher end listings but still, if you can't accept a few questions regarding your vague posting then I suspect your service is also lacking.