Diminished value comps
Support your Porsche 991 diminished value claim with completed auction comps from seven major platforms. Appraisers need evidence. Old Cars Data gives them normalized market records for the Porsche 991.
Pre-accident market value
Use these completed Porsche 991 auction results as the baseline for a diminished value calculation.
$114,000
median sale price
$79,000
25th percentile
$187,420
75th percentile
237
comparable sales
237 991 sales
Completed sales, not listing estimates
Updated daily
Yesterday's auction activity available today
Seven sources
BaT, Cars & Bids, Hagerty, PCAR, Gooding, and more
Definition
Diminished value is the reduction in a vehicle's market value after it has been damaged and repaired, even if repairs restore it to pre-accident condition. Once a 991 carries an accident history, its resale value decreases, and insurers may owe you compensation for that lost value.
To claim diminished value, you need evidence of your Porsche 991's pre-accident market value. Comparable sales data shows what similar examples actually sold for, providing objective proof for your claim.
We provide evidence, not appraisals
Old Cars Data provides the market evidence appraisers need. We do not provide appraisals, legal, or insurance advice. Share our 991 comparable sales with a licensed appraiser to:
Condition sensitivity
The Porsche 991 shows 95% price variation based on condition, mileage, and provenance. This high sensitivity makes comparable sales data critical for accurate diminished value claims, as condition differences significantly impact market value.
Evidence
When filing a diminished value claim for a Porsche 991, comparable sales data is essential. Our database tracks 237 recent auction sales, showing values ranging from $79,000 to $187,420, with a median of $114,000. The Porsche 991 shows 95% price variation based on condition, mileage, and provenance. This high sensitivity makes comparable sales data critical for accurate diminished value claims, as condition differences significantly impact market value. Use this data to support your claim with real market evidence from Bring a Trailer, Cars & Bids, Hagerty, PCAR Market, All Collector Cars, Gooding & Co, and RM Sotheby's.
Latest results
The most recent completed Porsche 991 auctions across all tracked sources.
"What did Porsche 991s sell for last month?"- get answers in seconds. Ask about values, trends, comparisons, or anything you'd look up manually.
MCP prompt log
Trust and transparency
Old Cars Data provides market data only. This is not legal, appraisal, or insurance advice. Always consult licensed professionals when filing a claim.
Sourced from Bring a Trailer, Cars & Bids, Hagerty, PCAR Market, All Collector Cars, Gooding & Co, and RM Sotheby's. All data represents actual completed sales, not estimates.
Reviewed by the Old Cars Data market data team. Data is updated daily and verified against source platforms.
Reference notes
Pull completed Porsche 991 auction results for your year and condition through the MCP server or REST API, then share those normalized records with a licensed appraiser to support their calculation.