# On Aggresion by Konrad Lorenz — resale value

Source: JunkPal price guide — https://junkpal.ai/products/on-aggresion-konrad-lorenz-ol3506034w

**On Aggresion by Konrad Lorenz** — resale value from real closed eBay sales.

Live listings and the full sold-price history are on the page: https://junkpal.ai/products/on-aggresion-konrad-lorenz-ol3506034w

Values are medians of real closed eBay sales, updated 2026-06-18. 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%3DKonrad%2520Lorenz%2520On%2520Aggression%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%3DKonrad%2520Lorenz%2520On%2520Aggression%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 | 9780844662138 |
| Brand | Konrad Lorenz |
| Published | 1966 |
| Publisher | Peter Smith Publisher Inc |
| Pages | 306 |
| Editions | 14 |
| Category | Psychology |

## On Aggresion resale value

**On Aggresion** by Konrad Lorenz (1966). Across 14 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 1966 edition still considered a valuable academic text?**

Yes, as a classic work on aggression, this 1966 publication by Konrad Lorenz remains relevant in psychology studies.

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

The book contains 306 pages and was published by Peter Smith Publisher Inc.

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

The ISBN for this 14th edition is 9780844662138.

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Full price guide: https://junkpal.ai/products/on-aggresion-konrad-lorenz-ol3506034w
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-06-18, based on real sold listings (junkpal.ai)"