Yes, too vague of a question
Research what has changed over the years
Model S - Options by Year - Tesla Motors Club Wiki
...and find out what is important to you.
I was in the $40,000 to $50,000 price range for 1-1/2 years, but I just picked up a 2013 MS with 100,000 miles on it for $26,000. I "saved" at least $15,000 off of my budget.
It has the older style leather seats, premium sound, free supercharging, adjustable suspension, tech package, no autopilot at all, one more year left on factory "motor and battery" warranty, and glass roof.
I mention these options as clues to you, so you can try to narrow down what is important to you.