Used 2018 Cadillac CT6 Price in the US
A used 2018 Cadillac CT6 in the US typically lists for $18,315–$27,035, with a median asking price of $22,500 across 120 active US dealer listings (as of 2026-10-17). The cheapest one listed right now is $10,199, a 2018 Luxury in Petersburg, TN — below 95% of the market, so expect high mileage, a base trim or a branded title — check the vehicle history.
- Typical range
- $18,315 – $27,035
- Median
- $22,500
- Cheapest 5%
- under $15,488
- Cheapest listed now
- $10,199
Browse by model year
typical price per yearCheapest 10 listed right now
ranked by price-
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$13,9992018 Cadillac CT6 Premium Luxury Csav152,342 mi · Oklahoma City, OK · Turbo Town AutosView listing → -
$14,7902018 Cadillac CT6 Luxury105,752 mi · Orlando, FL · Lions Pre-owned Cars USA LLCView listing → -
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$15,9902018 Cadillac CT6 Luxury89,578 mi · North Charleston, SC · New Life Auto SalesView listing →
These are the bottom of the market, not the going rate — every one is priced below 95% of active listings. A typical used 2018 Cadillac CT6 asks $18,315–$27,035. Cars this far under: expect high mileage, a base trim or a branded title — check the vehicle history.
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10 pinnedFAQ
How much does a used 2018 Cadillac CT6 cost?
A used 2018 Cadillac CT6 in the US typically lists for $18,315 to $27,035, with a median asking price of $22,500 across 120 active US dealer listings. Nine in ten are priced between $15,488 and $32,471 (as of 2026-10-17, source: UnderMarket Cars).
Is $23,000 a good price for a used 2018 Cadillac CT6?
That sits at about the market median ($22,500) for a used 2018 Cadillac CT6. Under $18,315 puts you in the cheapest quarter of active US listings and under $15,488 in the cheapest 5%; above $32,471 is the priciest 5% (as of 2026-10-17).
What is the cheapest used 2018 Cadillac CT6 for sale right now?
$10,199 — a 2018 Cadillac CT6 Luxury in Petersburg, TN, $12,301 under the median (as of 2026-10-17).
Are these MSRP or real asking prices?
Real asking prices from active US dealer listings, deduplicated by VIN — not manufacturer MSRP. They already reflect dealer discounts, and they exclude tax, title, registration and dealer fees.
How often are prices updated?
The listing data behind UnderMarket Cars is rebuilt from live US dealer inventory every few hours, and this used 2018 Cadillac CT6 page is regenerated from it when it is requested. The figures on this page are from 2026-10-17.
Explore more
Prices updated 2026-10-17. Data covers active dealer listings across the USA.