[Dan Semko]

Ask about the roller number. It will provide an idea of the updates and what to look for. If it has Wilwood brakes, ask about the anti-knock clips. If it has Trigo wheels, not the SPF version, but original Trigos, ask if the shims have been removed and the wheels turned. Look for the small features like the bug screen in front of the radiator, the inside vents (on the 700 series and above) Check the rear drivers CV boot. All minor things to consider but important to look at when purchasing a used SPF.
The factory updates will be handled by any SPF dealer, but modifications and owner desired updates, will be your responsibility. Ask also about any prior body or engine damage, and if it presents, who did the repairs. The MOST important benefit that you can create is to take a disinterested, knowledgeable person with you to inspect the car. This will counter-balance the wow factor and negate the cobra passion that may obscure your objectivity. After examining the car, LEAVE, have lunch, think about what you saw, then reapproach the seller. Write your questions down ahead of your initial visit and check them off respectively.
Best of Luck. They are wonderful !!