I have also never seen a rep/low quality minute repeater watch. You mention that you've seen tourbs but not minute repeater reps, this is because mechanically, the Chinese tourbillions are quite simple mechanically. They use a carriage type tourbillion that due to its robustness compared to fine swiss tourbs, are quite simple to assemble and manufacture. High end tourbs have almost excessive decoration and finesse, most assemblies comprising of 80+ parts weighing less than 3 grams. Minute repeaters on the other hand not only require more parts (which I don't think is too much of an issue for the chinese) but they require superior watchmaking knowledge and rationale to understand how the innards work and how to regulate the whole movement together. Minute repeaters, in my opinion, are the pinnacle of watchmaking complications. A real time, variable, hour, minute, striker.... WOW!!!