Two words: Circuit rot.
Why You Shouldn’t Buy Vintage Synths: 5 Compelling Reasons - gearnews.com
https://www.gearnews.com/why-you-shouldnt-buy-vintage-synths/
@flockofnazguls of course, if I worked for gearnews and kept losing auctions for vintage gear, I’d write an article like this to put off the competition 😉