There are no "bargains" available in radar detectors. The best one is Valentine One, and MANY of us in the TDR have them...
A "bargain" or "discount" radar detector will give you nowhere the range of protection that the V1 offers. When you consider the cost of points on your license, or losing it, and increased insurance rates, then the V1 looks like a bargain. They are ONLY available from the factory direct. Not available anywhere else.