# Why We Sleep by Matthew P. Walker — resale value

**Why We Sleep by Matthew P. Walker** — resale value from real closed eBay sales.

Values are medians of real closed eBay sales, updated 2026-06-19. They are estimates for reference, not offers or appraisals — condition, completeness and edition move them a lot, so compare against the sold listings before pricing anything.

## Check the market

- [Sold listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DWhy%2520We%2520Sleep%2520Matthew%2520P%2520Walker%26LH_Sold%3D1%26LH_Complete%3D1%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-sold&p=md-sold) — the closed sales these medians are computed from
- [Live listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DWhy%2520We%2520Sleep%2520Matthew%2520P%2520Walker%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-live&p=md-live) — what sellers are asking right now

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## Details

| Field | Value |
| --- | --- |
| UPC / EAN | 1501144316 |
| Brand | Matthew P. Walker |
| Published | 2017 |
| Publisher | Intrínseca |
| Pages | 360 |
| Editions | 11 |
| Category | Psychology |

## Why We Sleep resale value

**Why We Sleep** by Matthew P. Walker (2017). Across 11 editions. Used-book value depends heavily on edition (first printing vs. reprint), condition, dust jacket, and whether it's signed. First editions and out-of-print titles command the biggest premiums.

### What drives the price

First editions/first printings, intact dust jackets, signatures, and unmarked pages are the top value drivers. Book-club editions and later reprints are worth far less.

## FAQ

**Is this edition of "Why We Sleep" still highly sought after?**

Yes, as a 2017 publication, this book remains a relevant and sought-after title in the psychology genre.

**What is the ISBN for this edition?**

The ISBN for this specific edition is 1501144316.

**How many pages are in this book?**

This edition of "Why We Sleep" contains 360 pages.

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Full price guide: https://junkpal.ai/products/why-we-sleep-matthew-p-walker-ol20168133w
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-06-19, based on real sold listings (junkpal.ai)"