Hagerty recently released their Sept. 2021 collector car valuations.
Less than 2 years since Mark D's valuation posting (inserted below this latest graph) a Condition #2 '81 DMC-12's value has increased over 30%, from $45.5K to $60.8K.
Condition #3-4 car values increased at least 25% over that time, now showing at $40.4K and $26.2K, respectively.
And most Ds have doubled in value since 2015 regardless of condition.
Make of it what you will.