What a Buick Grand National/GNX GNX Is Actually Worth
True Value$144,800
Fair Range$127,400 - $162,100
Median Recent Sold$156,800
VerdictBUYER ADVANTAGE
As of October 2026, CarSearch.Pro's True Value model estimates a typical Buick Grand National/GNX GNX is actually worth $144,800 (fair range $127,400 to $162,100). Unlike the median asking price shown above, True Value is anchored to 10 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 $189,300 — about 31% above what these cars have actually been selling for. That gap favors patient buyers: negotiate from the sold data, not the ask.
As of October 2026, the Buick Grand National/GNX GNX market has 4 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $199,675, with the middle 50% of listings priced between $178,900 and $300,000. Buick Grand National/GNX GNX prices have increased 105.6% over the past quarter, from a median sale price of $192,500 to $395,773.
The typical Buick Grand National/GNX GNX on the market has 1,825 miles. Listings spend an average of 257 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 October 2026 is between $178,900 and $300,000 (25th to 75th percentile). Prices range from $178,900 to $300,000 across 4 active listings.
Price Distribution (4 Active Listings)
Percentile
Price
Meaning
10th
$178,900
Budget / project cars
25th
$178,900
Below average price
Median (50th)
$199,675
Typical market price
75th
$300,000
Above average / premium
90th
$300,000
Top tier / low miles / rare spec
The average asking price is $214,369, 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 105.6% over the past quarter. In 2026-Q3, the median sale price was $395,773 across 3 sales, up from $192,500 in 2026-Q1.
On a year-over-year basis, Buick Grand National/GNX GNX prices are up 147.4% ($395,773 vs. $159,995 a year ago).
Buick Grand National/GNX GNX Quarterly Sale Prices (Historical)
Quarter
Sales
Median Price
Average Price
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
2026-Q3
3
$395,773
$334,258
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 14,176 miles:
Odometer (approx.)
Value Multiplier
Implied Value
199 mi
1.41x
$203,580
4,139 mi
1.14x
$165,001
10,608 mi
1.04x
$150,841
19,996 mi
0.98x
$142,321
46,274 mi
0.96x
$139,567
54,618 mi
0.81x
$117,775
82,000 mi
0.69x
$99,549
154,919 mi
0.45x
$65,768
300,000 mi
0.31x
$44,969
Low-mileage examples carry a real premium in this market: around 199 miles, cars trade at roughly 1.41x the reference value. At the other end, 300,000-mile examples trade at about 0.31x. 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
58%
volatile
64% over 42 tests
12 months
↑ UP
40%
volatile
78% over 36 tests
24 months
↓ DOWN
64%
volatile
96% over 24 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 257 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 257 days.
Buick Grand National/GNX GNX Buyer's Guide Summary
Fair price range: $178,900 to $300,000. The median is $199,675. Anything below $178,900 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 105.6% recently. Buying sooner may save money if the trend continues.
Best value year: The 1987 model year has the lowest median price at $199,675, making it the most accessible entry point into Buick Grand National/GNX GNX ownership.
Negotiate: With an average of 257 days on market, sellers are often willing to negotiate. Listings over 60 days old are especially open to offers.