The daily index · September 2026 →
Used Price Index, August 2026
What secondhand prices did over August 2026, from 7 August, when the index starts, measured from the cheapest genuine used listing for each of about 1,434 specific models on every day of the month.
Revised 30 September 2026. These figures were recomputed when the index's method was corrected: a one-sided rule for discarding one-day moves, and an average that drifted when prices bounced, were fixed together (see the daily index page). As first published on 23 September 2026, the whole market read -0.1%.
Fell most over the month
- Sonos speakers -9.3%
- Electric guitars -4.0%
- Strollers -3.5%
- Welders -2.2%
- CPUs -2.1%
Rose most over the month
- Gaming laptops +2.0%
- MacBooks +2.0%
- Networking gear +2.0%
- Film cameras +1.8%
- Business laptops +1.2%
Every category
Categories with fewer than 8 models on the last day are left out, because one listing would swing them. Each figure is that category's own chained index over the month.
13 categories marked mostly on moved most of the month in one or two days. A category index moves 2% in a day only about once in eighty days, and when it does it is more often the collector matching different listings than a change in what things sell for, so those are left out of the lists above.
How to read this
It is a cheapest-listing index, so it tracks where the floor of the secondhand market sits rather than what a typical buyer pays. It is chained day to day, and a single-day move on one model of more than 25% up or 20% down is discarded as the collector matching a different listing rather than a price change. The full method is on the daily index page.
This page is written once, when the month ends, and is revised only when the method itself is corrected, which is stated at the top. The daily figures behind it are in the CSV, and the copy on GitHub has a commit for every day, so any number here can be checked against the day it was recorded.