Are used car prices going up in September 2026?

As of September 2026, the Manheim Used Vehicle Value Index — the leading wholesale benchmark — is down 0.85% month-over-month, and CarCast's aggregate 30-day forecast across 6081 segments is up 0.13%. Direction varies sharply by segment: trucks, SUVs, EVs, and classics each move on their own cycle. See the Rising and Softening leaderboards above for the segment-level breakdown.

What is the Manheim Used Vehicle Value Index (MUVVI)?

MUVVI is a monthly wholesale price index published by Cox Automotive that tracks transactions at Manheim auctions across the US. It's the most widely cited benchmark for the direction of US used-car wholesale prices. CarCast incorporates MUVVI into every segment forecast and shows the current MoM change and index level at the top of this page.

When will used car prices drop?

Used car price direction is segment-specific — there is no single "used car market." CarCast's 30-day forecasts classify each of 6081+ tracked segments as Rising (>+1.5% over 30 days), Stable (±1.5%), or Softening (below -1.5%). At any given time, dozens of segments are softening while dozens of others are rising. Browse the full vehicle index to find the 60-day outlook for any specific year/make/model.

How accurate are CarCast's used-car forecasts?

We publish mean absolute percentage error, not a single accuracy percentage. The current mean absolute percentage error, the number of forecasts scored, and the horizons included are on /accuracy. A forecast counts only after its horizon has elapsed, against the later MarketCheck listing median for that segment. That figure is a live outcome, not a historical model backtest, and it is not a guarantee for any one vehicle. We do not publish a directional hit rate.

How is CarCast different from MMR (Manheim Market Report)?

MMR is a backward-looking wholesale valuation — it tells you what a vehicle sold for in recent Manheim auctions. CarCast is a forward-looking AI forecast — it tells you where the segment's price is most likely heading over the next 60 days. The two are complementary: MMR anchors today's valuation, CarCast projects the next two months.

Why are used car prices still elevated?

Used-car retail prices (BLS CPI for used cars and trucks) are down 2.32% year-over-year as of September 2026. New-vehicle supply normalization since 2024, lease-return shortages, and segment-specific tailwinds for trucks, hybrids, and EVs are the structural drivers on the wholesale side. See the macro backdrop section above for current readings on both wholesale (MUVVI) and retail (CPI) trends.

Current trends

Used Car Market Trends — September 2026

A snapshot of the used car market in September 2026, computed from 6081 vehicle segments with 60-day AI forecasts, plus the wholesale (MUVVI) and retail (CPI) backdrop for the month.

Avg 30-day change

+0.13%

6081 segments

MUVVI MoM

-0.85%

Manheim wholesale

Used-car CPI YoY

-2.3%

BLS retail

Outlook

Stable

Aggregate trend

What was rising in September 2026

Vehicle	Body	30-day forecast
2022 Ferrari Purosangue	suv	+17.7%	Forecast
1988 Chevrolet Corvette	classic	+16.4%	Forecast
2020 Ferrari F8 Spider	supercar	+15.1%	Forecast
1989 Chevrolet Camaro	classic	+13.9%	Forecast
2026 Volkswagen ID.4	suv	+13.8%	Forecast

What was softening in September 2026

Vehicle	Body	30-day forecast
2019 McLaren 750S	supercar	-19.7%	Forecast
1995 Ford Bronco	classic	-16.2%	Forecast
2020 Ferrari Roma	coupe	-15.8%	Forecast
2022 Lamborghini Aventador	supercar	-14.9%	Forecast
2024 Ferrari Roma	coupe	-14.4%	Forecast

Holding value in September 2026

Vehicle	Body	30-day forecast
2008 Porsche 911 997	coupe	-18.8%	Forecast
1996 Porsche 911 993	coupe	-18.1%	Forecast
2019 Ferrari Roma	coupe	-16.9%	Forecast
2018 Porsche 911 GT3	supercar	-16.8%	Forecast
1997 Toyota Land Cruiser	classic	-16.7%	Forecast

See current month trends

Forecasts and trend classifications are informational analytics only and do not constitute financial advice or a recommendation to purchase, hold, or sell any vehicle. Individual market conditions vary.