We strive to provide the best products. While the ultra-cheap dongles are nice to toy around with, they do not provide the performance of the Airspy series receivers. It is a far better value to purchase an Airspy receiver that will not suffer from the dynamic range, overload, and drift issues that plague all the ultra-cheap dongles. Even the “improved dongles” suffer the same issues. We know – we’ve tested them (know your competition and their weakness). They are a very slight improvement over the previous models.