# Signals and linear systems by Robert A. Gabel — resale value

**Signals and linear systems by Robert A. Gabel** — resale value from real closed eBay sales.

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%3DSignals%2520and%2520linear%2520systems%2520Robert%2520A%2520Gabel%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%3DSignals%2520and%2520linear%2520systems%2520Robert%2520A%2520Gabel%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 | 0471628069 |
| Brand | Robert A. Gabel |
| Published | 1970 |
| Publisher | Wiley |
| Pages | 480 |
| Editions | 7 |
| Category | Mathematics |

## Signals and linear systems resale value

**Signals and linear systems** by Robert A. Gabel (1970). 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 1970 edition still relevant for modern signal processing studies?**

As a foundational text, the 1970 edition by Robert A. Gabel remains a classic reference in the field of mathematics.

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

The ISBN for this 7th edition is 0471628069.

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

This comprehensive mathematics text contains 480 pages.

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Full price guide: https://junkpal.ai/products/signals-and-linear-systems-robert-a-gabel-ol5260690w
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)"