: Original UK pressings and used Canadian imports (1972) can be found at stores like The Record Centre and Aux 33 Tours.

John Farrar was a Member of 'Marvin, Welch and ... - Facebook

For collectors, original and remastered versions are available through various retailers:

A defining technical feature of Second Opinion is its availability in . In 1973, a specialized Quadraphonic LP was released in the UK on the Regal Zonophone label (catalogue number Q4SRZA 8504).

Marvin, Welch & Farrar: A "Second Opinion" on Harmony and Innovation