No mate, as they only seem to do an upgrade path from a genuine older RT dongle to the new one, so overall new one needed afaik, but could sell yours personally to an 8L boy but they would need to act as you for support as license as you have arent transferable, but tbh the older version has all the support on forums anyway so they shouldnt need any with RT, thats why genuine cable is great cause you could sell that later if need be.
So new one is best option, sorry but name me one person thats regretted, not one of my buyers has comeback with a fault, issue etc, they just work mate & ****** well at that on all vag cars & not linked to one laptop & no limited functions.