You forgot the "I just gotta have it!".
A car that fills out a collection, or reminds a person of the "good old days", is their most desirable color, or sounds just right also will make it worth more to an emotional buyer.
If your wife/GF likes it, and encourages you to buy it that will bring more $.
If it is a warm sunny day, the Vert will bring the bucks. On a cold, snowey night, the 4WD with seat heaters will bring out the wallet.
Two kinds of buyers. The cold, inpersonal gotta think only about the money people, and those that are willing to trade some $ for a real memory maker : >)
Vipers appeal to both. There are some great values out there right now, with some pretty fantastic used Vipers going for the price of a loaded Camary.
There are also some real appealing Vipers that can change the life of the owners. The cars come with access to one of the most desirable club and support systems of any cars.
I know that when I push the start button, and that V-10 comes alive, it brings me more joy than a bag of money under the mattress.
The ViperNation is real. It is alive, and it offers life changing experiences those lucky enough to step up.
As the old beer commercial said...Grab the Gusto.
More trendy is "Life is Good"