As of June 2026, the Buick Grand National/GNX GNX market has 6 active listings across 14 marketplaces tracked by CarSearch.Pro. The median asking price is $18,600, with the middle 50% of listings priced between $18,600 and $189,900. Buick Grand National/GNX GNX prices have decreased 15.7% over the past quarter, from a median sale price of $22,000 to $18,550.
The typical Buick Grand National/GNX GNX on the market has 14,000 miles. Listings spend an average of 129 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 June 2026 is between $18,600 and $189,900 (25th to 75th percentile). Prices range from $600 to $300,000 across 6 active listings.
Price Distribution (6 Active Listings)
Percentile
Price
Meaning
10th
$600
Budget / project cars
25th
$18,600
Below average price
Median (50th)
$18,600
Typical market price
75th
$189,900
Above average / premium
90th
$300,000
Top tier / low miles / rare spec
The average asking price is $91,050, 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 decreased 15.7% over the past quarter. In 2026-Q2, the median sale price was $18,550 across 9 sales, down from $22,000 in 2026-Q1.
On a year-over-year basis, Buick Grand National/GNX GNX prices are down 88.4% ($18,550 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
6
$159,995
$153,758
2025-Q3
10
$202,000
$143,554
2025-Q4
19
$29,000
$59,152
2026-Q1
12
$22,000
$35,189
2026-Q2
9
$18,550
$27,529
Where to Buy a Buick Grand National/GNX GNX
The highest concentration of Buick Grand National/GNX GNX listings is in CA with 4 active listings.
Top States by Inventory
State
Listings
CA
4
Buick Grand National/GNX GNX Market Velocity
Buick Grand National/GNX GNX listings spend an average of 129 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 129 days.
Buick Grand National/GNX GNX Buyer's Guide Summary
Fair price range: $18,600 to $189,900. The median is $18,600. Anything below $18,600 is a strong value; above $189,900 should be premium condition, low miles, or a desirable specification.
Trending down: Buick Grand National/GNX GNX prices have dropped 15.7% recently. Patient buyers may benefit from waiting, but desirable examples still sell quickly.
Best value year: The 1987 model year has the lowest median price at $18,600, making it the most accessible entry point into Buick Grand National/GNX GNX ownership.
Negotiate: With an average of 129 days on market, sellers are often willing to negotiate. Listings over 60 days old are especially open to offers.
Data sourced from 3 marketplaces including eBay Motors, Bring a Trailer, Cars & Bids,
AutoTrader, CarGurus, Cars.com, Facebook Marketplace, Classic.com, and Hagerty Marketplace.
Updated daily by CarSearch.Pro's automated pipeline.
Browse all 6 active Buick Grand National/GNX GNX listings.