Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

Do these ever come up on T'bay without arms?

I had Rotor 3D cranks with 165mm arms, that I had to special order. So I'd really like to keep them.

I had a look but cannot find the email, from memory when I enquired the powermeter itself is ~770 euro/660 GBP or thereabouts.