'Kinda like asking if Casino (s) are straight or crooked.
'Kinda like asking if Bank(s) are straight or crooked.

AutoNation's business model involves relieving you of as much wealth as possible
[for the perceived (on your part) return of a functional automobile]
WITHOUT 911 having to be dialed by either party.
AS DO ALL AUTOMOBILE DEALERS (New or "Pre-Owned").

EXAMPLE:
They have a "UNIT" they proffer to the general public for 5K USD...
You walk in and offer them 10K USD.
(DO YOU THINK THE SALES WEASEL WILL SAY, "NO" ?)

Better Example:
They have a unit they paid 2.5K USD for...
They proffer it to the General Public for KBB or Edmonds retail @ 5K USD.

To Help you answer your own question:
See if they'll deliver to you the name,address and 'Phone # of the previous owner.
See if they'll offer to you the sales contract involved in the unit's purchase.

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'84 300SD sold
124.128