When I was a young un, I only had access to the audio versions. They're basically punctuated every 30 seconds with Manuel saying things like 'And then, Mr Fawlty, he hit me on the head, very hard!'.
Because the humour is so physical, it makes these recordings really jarring. I didn't know any better at the time, but when I finally saw the proper TV versions, I couldn't go back.
Not quite sure the world needs a £90 vinyl box set of these, and I'm saying that as someone for whom these recordings were their introduction to Fawlty Towers.