It's just somebody's marketing gimmick to make you think you're getting something special. IOW, BS.
I just looked at one of their auctions, where the radio offered has been "Supertuned" and ran through their "Spectrun Analyzer". Yes, that's how they spelled it. Also states the radio will put out 30-40 watts, but fail to mention in what mode.
Seems their certified radio technician has been doing this for 40 years. That's nice. Who certified the tech? What, exactly, is the certification?
They state in that auction that they set the radio for modulation at "100%, with Loud, and Clear Audio Reports." Well, yeah, at 100% modulation if your audio isn't loud and clear you've probably done something horribly wrong.
I will give them credit for answering their neutral feedback, and not having any negatives in the last year. So they at least deliver a functional product to the end user and do seem to care about their reputation.
To me it sounds like the standard "peak and tune" you could just about anywhere. Well, anywhere a CB shop still exists. But it has to have a grizzled old technician who still smokes at his bench to give it that authentic flavor.
Personally I wouldn't pay what they're asking, but then I tend to buy broken crap off of ebay and craigslist and try to fix it with the occasional success. OK, rare success.