# x + y by Eugenia Cheng — resale value

Source: JunkPal price guide — https://junkpal.ai/products/x-y-eugenia-cheng-ol20978078w

**x + y by Eugenia Cheng** — resale value from real closed eBay sales.

Live listings and the full sold-price history are on the page: https://junkpal.ai/products/x-y-eugenia-cheng-ol20978078w

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%3DEugenia%2520Cheng%2520x%2520y%2520mathematics%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%3DEugenia%2520Cheng%2520x%2520y%2520mathematics%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

eBay links are affiliate links: JunkPal may earn a commission at no cost to you.

## Details

| Field | Value |
| --- | --- |
| UPC / EAN | 883331541X |
| Brand | Eugenia Cheng |
| Published | 2020 |
| Publisher | Basic Books |
| Pages | 280 |
| Editions | 7 |
| Category | Mathematics |

## x + y resale value

**x + y** by Eugenia Cheng (2020). Across 7 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 a rare edition of x + y by Eugenia Cheng?**

This title has been published in 7 editions, so it is not considered rare, but the 2020 edition is a specific version.

**What is the publisher of this math book?**

The publisher of x + y by Eugenia Cheng is Basic Books.

**How many pages are in the 2020 edition?**

The 2020 edition of x + y by Eugenia Cheng contains 280 pages.

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Full price guide: https://junkpal.ai/products/x-y-eugenia-cheng-ol20978078w
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)"