FACTORY SERVICED in other words they didn't work right the first time they came out of the factory.
How much effort do you think they put into fixing them if they were going to wholesale them out even at $15, and it was probably closer to $10 or so.
I'm thinking that 10 miles with 3 watts is a lot optimistic. These have omnidirectional antennas, so the actual power radiated in any direction is a lot less. And at that frequency range, it's line of sight only, a lot of stuff attenuates (soaks some of the signal up) the signal. 10 miles is line of sight best case conditions. I'ld really be surprised if you got an effective range of more than a mile.
But for the price, they might not be too bad, for a short range unit, just don't go into thinking you are going to get fantastic comms.