Used 2018 Cadillac CT6 Price in the US
A used 2018 Cadillac CT6 in the US typically lists for $19,893–$28,402, with a median asking price of $22,999 across 115 active US dealer listings (as of 2026-08-30). The cheapest one listed right now is $10,199, a 2018 Luxury in Petersburg, TN — below 95% of the market, so expect an older model year, a base trim or high mileage.
- Typical range
- $19,893 – $28,402
- Median
- $22,999
- Cheapest 5%
- under $14,208
- Cheapest listed now
- $10,199
Browse by model year
cheapest per yearCheapest 10 listed right now
ranked by price-
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$12,9992018 Cadillac CT6 Luxury174,030 mi · Snellville, GA · Starz Automotive GroupView listing →
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$13,9872018 Cadillac CT6 Premium Luxury144,823 mi · Leesburg, VA · Leesburg Auto ImportView listing →
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$14,2992018 Cadillac CT6 Premium Luxury Csav152,263 mi · Oklahoma City, OK · Car Gallery, LLCView listing → -
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$15,8462018 Cadillac CT6 Luxury147,856 mi · Ann Arbor, MI · LaFontaine INFINITI Ann ArborView 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 $19,893–$28,402. Cars this far under usually carry an older model year, a base trim or high mileage.
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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 $19,893 to $28,402, with a median asking price of $22,999 across 115 active US dealer listings. Nine in ten are priced between $14,208 and $33,529 (as of 2026-08-30, source: UnderMarket Cars).
Is $23,000 a good price for a used 2018 Cadillac CT6?
That sits at about the market median ($22,999) for a used 2018 Cadillac CT6. Under $19,893 puts you in the cheapest quarter of active US listings and under $14,208 in the cheapest 5%; above $33,529 is the priciest 5% (as of 2026-08-30).
What is the cheapest used 2018 Cadillac CT6 for sale right now?
$10,199 — a 2018 Cadillac CT6 Luxury in Petersburg, TN, $12,800 under the median (as of 2026-08-30).
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?
UnderMarket Cars refreshes US dealer listings continuously and re-generates this used 2018 Cadillac CT6 price page at least twice a day. The data date shown on this page is 2026-08-30.
Explore more
Prices updated 2026-08-30. Data covers active dealer listings across the USA.