What a Buick Grand National/GNX GNX Is Actually Worth
True Value$46,400
Fair Range$15,800 - $52,000
Median Recent Sold$156,800
VerdictCOOLING
As of September 2026, CarSearch.Pro's True Value model estimates a typical Buick Grand National/GNX GNX is actually worth $46,400 (fair range $15,800 to $52,000). Unlike the median asking price shown above, True Value is anchored to 9 recent confirmed sales, normalized for mileage, and blends auction hammer prices (grossed up for buyer's premium) with real-world asking behavior.
Sellers are currently asking a median of $179,900 — about 288% above what these cars have actually been selling for. That gap favors patient buyers: negotiate from the sold data, not the ask.
Priced above trend · momentum cooling — but volatile.
As of September 2026, the Buick Grand National/GNX GNX market has 7 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $179,900, with the middle 50% of listings priced between $178,675 and $300,000. Buick Grand National/GNX GNX prices have increased 3.5% over the past quarter, from a median sale price of $186,030 to $192,500.
The typical Buick Grand National/GNX GNX on the market has 1,111 miles. Listings spend an average of 148 days on market before selling or being removed.
Current Buick Grand National/GNX GNX Pricing
A fair price for a Buick Grand National/GNX GNX in September 2026 is between $178,675 and $300,000 (25th to 75th percentile). Prices range from $178,675 to $399,840 across 7 active listings.
Price Distribution (7 Active Listings)
Percentile
Price
Meaning
10th
$178,675
Budget / project cars
25th
$178,675
Below average price
Median (50th)
$179,900
Typical market price
75th
$300,000
Above average / premium
90th
$399,840
Top tier / low miles / rare spec
The average asking price is $227,952, which is higher than the median, indicating that high-priced outliers (rare specifications, very low mileage, or concours-quality examples) pull the average up.
Buick Grand National/GNX GNX Price Trends
Buick Grand National/GNX GNX prices have increased 3.5% over the past quarter. In 2026-Q1, the median sale price was $192,500 across 1 sales, up from $186,030 in 2025-Q4.
On a year-over-year basis, Buick Grand National/GNX GNX prices are up 88.7% ($192,500 vs. $101,987 a year ago).
Buick Grand National/GNX GNX Quarterly Sale Prices (Historical)
Quarter
Sales
Median Price
Average Price
2024-Q2
7
$142,000
$139,164
2024-Q3
9
$143,000
$161,333
2024-Q4
2
$133,000
$133,000
2025-Q1
2
$101,987
$101,987
2025-Q2
5
$159,995
$181,959
2025-Q3
7
$205,000
$208,943
2025-Q4
5
$186,030
$181,225
2026-Q1
1
$192,500
$192,500
How Mileage Affects Buick Grand National/GNX GNX Value
Most price guides assume value falls linearly with mileage. It doesn't. CarSearch.Pro learns the actual price-vs-mileage curve for the Buick Grand National/GNX GNX from confirmed sales, referenced to a typical example at about 15,232 miles:
Odometer (approx.)
Value Multiplier
Implied Value
290 mi
1.38x
$64,174
4,139 mi
1.14x
$52,841
10,608 mi
1.05x
$48,586
19,996 mi
0.98x
$45,577
46,274 mi
0.98x
$45,500
54,618 mi
0.84x
$38,999
82,000 mi
0.71x
$32,725
154,919 mi
0.43x
$20,074
300,000 mi
0.33x
$15,242
Low-mileage examples carry a real premium in this market: around 290 miles, cars trade at roughly 1.38x the reference value. At the other end, 300,000-mile examples trade at about 0.33x. Implied values here are anchored to this market's True Value.
Buick Grand National/GNX GNX Price Forecast
Horizon
Direction
Probability
Regime
Past Accuracy
6 months
↓ DOWN
55%
volatile
62% over 45 tests
12 months
↓ DOWN
57%
volatile
72% over 39 tests
24 months
↓ DOWN
59%
volatile
85% over 27 tests
These are probabilistic direction calls, not price targets. The "Past Accuracy" column is this model's real walk-forward record on the Buick Grand National/GNX GNX — every month we re-run the forecast as if we only knew what was knowable then, and grade it against what actually happened. We publish the hit rate either way. Full methodology & track record →
Where to Buy a Buick Grand National/GNX GNX
The highest concentration of Buick Grand National/GNX GNX listings is in CO with 2 active listings.
Top States by Inventory
State
Listings
CO
2
Buick Grand National/GNX GNX Market Velocity
Buick Grand National/GNX GNX listings spend an average of 148 days on market. This is a slow-moving market. Listings tend to sit for extended periods, giving buyers significant negotiating power. Sellers should be realistic on pricing and patient.
The median time on market is 219 days.
Buick Grand National/GNX GNX Buyer's Guide Summary
Fair price range: $178,675 to $300,000. The median is $179,900. Anything below $178,675 is a strong value; above $300,000 should be premium condition, low miles, or a desirable specification.
Trending up: Buick Grand National/GNX GNX prices have risen 3.5% recently. Buying sooner may save money if the trend continues.
Best value year: The 1987 model year has the lowest median price at $179,900, making it the most accessible entry point into Buick Grand National/GNX GNX ownership.
Negotiate: With an average of 148 days on market, sellers are often willing to negotiate. Listings over 60 days old are especially open to offers.