Welcome, David. The response (or lack thereof) you have received is rude, but unfortunately it seems to be the way of some communication these days. Perhaps it's because of your lack of feedback, or perhaps it's because you've coincidentally contacted only dud/uncommunicative sellers.
In any case, keep plugging away at the offers. Sooner or later you'll receive a pleasant reply, and a transaction will follow shortly thereafter.
In any case, keep plugging away at the offers. Sooner or later you'll receive a pleasant reply, and a transaction will follow shortly thereafter.