Well, reading this thread, I can only assume two things: you are all much wealthier than I; you always use a tripod. If not, you're delusional.
I would own neither Porche nor VW; the Porche because it would drain my account pretty rapidly and any VW other than, perhaps, the Scirocco, because the rest of them share the glamour of a walnut.
When I was in business I always bought new, mainly because as, with cars, I felt buying used meant you simply took on board somebody else's problems. As it was all written off against tax anyhow, it made no sense to buy the cheapest and take on the risks. Now, long retired, I'm more careful with my pennies and have bought my last three lenses second-hand; three Nikkors: 2/35mm, 2.8/105mm Micro and 8/500mm reflex. All of them are non-af and feel as solid as a rock. I have absolutely no quibble with either physical state or delivery. They give what I expected from them and what else matters? I never look at any lens charts because I don't honestly understand what they are all about, and even if I did, they would have zero influence in how I make pictures. Any regrets? Yes, I'd had all of these focal lengths for years, but sold them off in an absolute change to 6x7. I wish I hadn't done that, ever. I was delusional, too.