I’ve been watching this for a very long time.
Feel free to pick at my break-down below and call me bonkers, but I genuinely feel that these are pretty accurate ranges these days - and what the marque deserves in 2018.
$10-20k
Ok but generally poor condition. May or may not drive but will need considerable work done ($15-30k vendor) to update cosmetics, mechanical and electrical components. In most cases parts cars would fall into the lower end of this category.
$30-$40k
Generally v-nice cars. Good cosmetics but may not stand up to a critical eye on closer inspection. Also generally well maintained but will probably need a laundry list of updates and fixes that the owner hasn’t gotten around to. May need ($5-10k vendor) of work done to bring it up to higher cosmetic and mechanical standard.
$40-55k
Excellent cars. Great cosmetics that generally hold up on closer inspection. Very well maintained and updated. Should need very little done and should generally be a great driver and show car. Should be accompanied by a comprehensive breakdown of everything that’s been updated over the years to show that very little $ needs spent on it.
A1 - $55-75k
Show cars with outstanding cosmetics, a super clean frame and body along with almost all mechanical and electrical updates done. Should look like it rolled off the showroom floor and should operate perfectly. Cars like this should also be accompanied by a comprehensive breakdown of everything that’s been updated over the years to show that almost nothing needs updated.
Near-Concours with all modern updates completed - $75-90k
Almost perfect in every way (yes, there's no such thing as a perfect DeLorean). You should be able to eat your dinner off the frame and every part and component should look like it just rolled off the production line. It should pass almost every section of the Millennium Concours judging book - but with the exception of having all modern updates completed. This includes refined cosmetics, mechanics and electrics to be a safe driver with no issues what-so-ever. At this level you’re close to what DMCH plan to sell for ~$100k. A near-perfect example of the marque.
Concours (Untouched & Original) - $100k+
Flawless. Every component should be accurate and original. It should pass every section of the Millennium Concours book and really should be in a collector museum. Probably not safe to drive without significant updates but the value here is in originality and accuracy. Very few of these examples exist.
Random sources:
https://www.youtube.com/watch?v=gbcP9J8FB_g
http://www.nydailynews.com/autos/q-s...icle-1.2402960
https://bringatrailer.com/listing/1983-delorean-dmc-12/