Although illegal, I've noticed more and more interest in radios which can be modified, optioned, etc, particularly in the prepper and survivalist community. I happened to see one setup at a persons home and was fascinated that they have figured out certain CB radios from China can do FM, out of band TX/RX, packet, etc. One of the "ops" I talked to said the only negative is most Chinese radios do not come with schematics or service manuals to hack them further, or repair.
I was so intrigued that I purchased one of the radios, and have been playing with it on the bench. Two interesting observations. In the FM mode, their spec for opening squelch is better than they state. On the negative side, their claimed power is stated to be 4 watts, while the stock radio I got was 3.34 watts. Their RF deck is somewhat lacking, which is why most people use amps and set the radio to 1 watt. Caveat: My testing has been into a load with service monitor. However, with the radio into an antenna, the receive side was pretty darn good.