Ok, so I have never sold anything here yet, heck I'm just getting started. But I have bought quit a few items from the great folks here and unless they state "or best offer" I pay what they are asking if it is reasonable and within my price range for that item. But to the extent of what the O.P. has posted about email responses, I appreciate the seller to give a tracking number especially if I have just transferred hundreds of dollars to them. But it seems that is a problem with some folks. I know tracking numbers are always given no matter how you ship. I am dealing right now with an MTH authorized distributor that has close to a thousand dollars of mine and is totally unresponsive. After payment, nothing.
Communication is key to instilling trust. Just do it.