Tara Labs IC range ? Which one to better RSC Prime

Dear ALL, positively surprised by a second hand Tara labs RSC Prime interconnect, I am looking forward to detect which other secon hand Tara Labs could grab at decent price to escalate up in their range (An even better one I mean).
Of the above I like the warm & transparency sound; is this the Tara imprinting ?

I gave a look to their site but was hard for me to understand how the RSC prime was positioned in their product range: is it a medium quality cable for Tara ?
Many thanks and would appreciate indications which one to get at decent prices that can be even better than the RSC Prime without pulling a leg.