Transparent can sound terrible in many set ups but if they work in your set up they work better than anything else. A fast, dynamic, 'punchy' performer that is very detailed. I have the music link Super but it sounds poor in my current set up though it was superb with the Bryston amps.
I hope u are buying used as new is very steep. A used M LINK + should be 7/8K for a 1M pair.
As u are aware cables are system specific so hearing it in ur set up is the only solution. Its a good cable and 7K is fair price. Just keep in mind this is the older one and not the MM2 so the internet price of 400 USD for a new pair is a little misleading.