I've auditioned/purchased both new and used Synergistic, Kimber, Wireworld, Analysis Plus and Audioquest components, from The Cable Company, without a hitch or disappointment, for over 25 years*.
As long as I’ve used their Lending Library*, for interconnect, power and speaker cable auditions; their policy has been a 10% rental fee, plus shipping.
The stipulations have always been quite plainly outlined on the site, regarding that fee and subsequent purchases and/or returns, (no surprises).
It’s just my own perspective, but: that seems quite reasonable, given the alternative of purchasing all those items, then having to sell the rejects at a much greater loss.