2017 Summary
I have not given an update in a while, but I have not been sitting idle. It is hard to believe, but the number of NSXs in my database has more than doubled since I first made the original post here (current NSX count is nearly 2200, compared to nearly 900 originally). This was made possible through diligently recording new listings as well as traversing further back in time through Prime and an eBay sale archive to the beginning of 2012.
Here are some changes I made since the original post:
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Structure change to the price models:
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Improved the way time effects the price equation, now a new equation is created for each NSX group (1991, 1992, 1993-4, 1995-6, 1997-9, 2000-1, 2002-5) each year.
Where possible, created separate models with only listing prices and only actual sale prices. Much of the original post is devoted to the struggle and reservations of making conclusions based on listing prices rather than actual sale prices. Creating model(s) that are based solely on actual sale prices removes those reservations.
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Improved calculated effects of special factors:
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Now special factors are based on actual sale prices
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Added maintenance as a factor:
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[TABLE="class: grid, width: 600"]
<tbody>[TR]
[TD]-2[/TD]
[TD]Major maintenance is needed, ex. timing belt & clutch & ABS & coolant hoses[/TD]
[/TR]
[TR]
[TD]-1[/TD]
[TD]Some maintenance is due, ex. timing belt or clutch or ABS or coolant hoses[/TD]
[/TR]
[TR]
[TD]--[/TD]
[TD]Unknown or minimal maintenance[/TD]
[/TR]
[TR]
[TD]1[/TD]
[TD]Some mention of maintenance, one major item complete, ex. timing belt[/TD]
[/TR]
[TR]
[TD]2[/TD]
[TD]No or minimal maintenance needs, multiple major items complete[/TD]
[/TR]
[TR]
[TD]3[/TD]
[TD]Major/regular maintenance by prestigious NSX service name (the Whisperer, etc.)[/TD]
[/TR]
</tbody>[/TABLE]
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Only about 100 NSXs have this information, so conclusions are forthcoming. So far, both -2 and 3 are both showing strong effects on listing prices.
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New conclusions:.
The rule of thumb for actual sale prices.
Across all years, types, and colors of NSXs, through out all of time, I observed a trend. When compared to listing prices, the actual sale price of NSXs averaged out to be 90% of the predicted listing price. This means if you want a rough idea of what a listed NSX is worth, take its listed price and multiply by 0.9.
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Definitive effects on price:
Based on only actual sale data. Each effect was calculated by filtering the data to show only actual sale prices of one factor at a time (i.e. when calculating the effect of an automatic transmission, I removed the cars with both automatic and a salvage title)
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[TABLE="class: grid, width: 400"]
<tbody>[TR]
[TD="align: center"]Factor[/TD]
[TD="align: center"]Value Effect[/TD]
[/TR]
[TR]
[TD]Automatic Transmission[/TD]
[TD="align: center"]-10%[/TD]
[/TR]
[TR]
[TD]Salvage Title[/TD]
[TD="align: center"]-21%[/TD]
[/TR]
[TR]
[TD]Accident history (but no salvage title)[/TD]
[TD="align: center"]-4%[/TD]
[/TR]
</tbody>[/TABLE]
What happened in 2017??.
I saw a fair amount of fearful comments throughout the year about the state of the NSX market . To the effect that values are going down, Senna forbid, and the sky is falling. In some instances, these comments were not entirely without merit. In particular, BringaTrailer.com saw some lower-than-expected sale prices and several NSXs there did not meet reserve. Well, I'm here to provide a voice of reason... with data! We're going to look at the actual sale prices for each class of clean title, low modified, manual transmission NSX. These graphs show price vs. miles; the different colors indicate the different years of data. 2012 is the blue line and points, 2013 is red, 2014 is yellow, 2015 is green, and the two years we'll be looking at, 2016 and 2017, are purple and aqua. A higher trendline indicates that NSXs with the same mileage are selling for more money, i.e. values are increasing.
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I have the most data points for NA1 Coupes so they present the strongest case; we'll start there
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NA1 Coupe 1991-1994
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The trendlines, Actual Price (Value) vs. Miles, for 2016 and 2017 are nearly right on top of each other. This data suggests that no significant change in NA1 Coupe values occurred from 2016 to 2017 across all mileage.
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While all other NSX types have fewer data points, the trend continues:
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NA1 Targa 1995-1996
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As miles increases, the 2017 trendline does seem lower than the 2016 trendline, albeit with considerably fewer data points than the NA1 Coupe data. This data suggests that NA1 Targa values went down slightly at higher mileage.
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NA2 Targa 1997-2001
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Due to lack of high mileage sale data, the 2016 trendline was removed. The 2017 data points seem to follow a similar pattern to the 2016 data, though again a lack of sale data hinders the conclusion. This suggests that NA2 Targa values did not significantly change. A notable sale at $82,000 came from Bringatrailer.com, a strong price for a 2000
Silverstone.
NA2 Targa (Facelift) 2002-2005
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Due to lack of high mileage sale data, the 2017 trendline was removed. The 2017 data points seem to fall in line with the 2016 trendline, with a similar lack of data. This suggests that NA2 Targa (Facelift) values did not significantly change. A noteable sale of a purported $135,000 came from an 2005
Imola Orange /
Orange.
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An important note is that these graphs only show completed sales, NSXs that did not meet reserve are not included. One reason for an NSX to not meet reserve is that the seller has an unrealistically high reserve. A more common reason is the right bidders are not present in the auction to drive up the bids to be in line with the car's predicted value. Such is the fickle nature of auctions, but their data is the best source for determining the raw value of an NSX and they show values are holding steady.
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Summary:
- To roughly estimate an NSX's value, multiply the listing price by 0.9.
- The decreases in value caused by Automatic transmissions, Salvage titles, and Accident histories are properly quantified.
- The NSX market generally held constant from 2016 to 2017 and values are not going down.
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As always, feel free to chime in with questions. I'm looking forward to seeing what 2018 brings!