Buying used: how old is too old?

I have 75 year old drivers that will be here 75 years from now and work the exact same way they did when they were first made.

I have hard wood furniture that is 300 years old and silks that are well over 100 yeas old.

Crossover parts that’s about all that will wear out.. Plastic will even hold up 50 plus years in a controlled environment, Bake-o-lite 300 years?

Ribbon speakers, as long as you can fold tinfoil you can fix them..

I have terminal blocks well over 100 years old..

So what’s gonna wear out? Round speakers? Now you see the problem..

They will last 60 plus. I have Watkins drivers that have NEVER been touched and the BR surrounds are still intact. Infinity Infinitesimals.
they will last another 25 years with care.. 7-80 years.

I chipped a front tooth 45 years ago. If I would have fixed it then I wouldn’t have it now. I fixed it with epoxy and my dentist added the final touchup.. 45 years ago.. As a matter of fact it's the only ONE that hasn't been messed with.

100% agree with you clearthinker

I listened to the Tekton Moabs at the Capital Audiofest… in a word - JUNK!

and for the record, I run 40 year old MAGNEPAN Tympani 1Ds that will kick the crap out of most high end production speakers of today (even current Maggie’s).

All I know is this: I bought a pair of Klipsch Cornwalls from the early 80's a couple years ago, and they sound magical; it was the best $800 I ever spent.

My Seas Thors sound EXACTLY as they did when I bought them back in 2004.
Richard Gray advised me on upgrading the Millennium tweeters , which i did, and was a big mistake, = out $700,
Richard tested the old ones on his ohm tester and found a tiny miniscule fraction of a ohm off,,so I bought a new pair, Out $700 as they sounded exactly like the old ones. I since dumped the Millennium tweets at 1/2 price and will never ever go back to dome tweeters, I use a FR/PS for mids Far superior to all dome tweets. Like the one you have in your speakers.
So old vs new, = same speaker.