# Tentacool #20 — resale value

Source: JunkPal price guide — https://junkpal.ai/products/tentacool-20-pokemon-japanese-undone-seal-card

**Tentacool #20** is worth about **$3** ungraded, based on real closed eBay sales.

Live listings and the full sold-price history are on the page: https://junkpal.ai/products/tentacool-20-pokemon-japanese-undone-seal-card

## Value by tier

| Condition | Value (USD) |
| --- | --- |
| Ungraded | $3 |

Values are medians of real closed eBay sales, updated 2026-07-25. 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%3DTentacool%252020%2520Pok%25C3%25A9mon%2520Japanese%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%3DTentacool%252020%2520Pok%25C3%25A9mon%2520Japanese%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 |
| --- | --- |
| Brand | Pokémon |
| Set | Pokémon Japanese Undone Seal |

## Tentacool #20 (Pokémon Japanese Undone Seal) card value

An ungraded **Tentacool #20** from Pokémon Japanese Undone Seal averages around $3. A Grade 9 copy runs about null, and a PSA 10 gem-mint commands null.

### What drives the price

Centering, corners, edges, and surface decide a card's grade — and the grade decides the price. The jump from raw to PSA 10 can be 5–20×, so condition is everything. Holos, first editions, and shadowless prints carry the biggest premiums.

## FAQ

**What is the current resale value for this Ungraded Tentacool #20?**

The current listing price for this Ungraded item is $3.

**Is the "Undone Seal" designation important for its value?**

Yes, the Japanese Undone Seal designation is part of the set information that contributes to its collectible value.

**What game is this Pokémon card from?**

This card is from the Pokémon game line.

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Full price guide: https://junkpal.ai/products/tentacool-20-pokemon-japanese-undone-seal-card
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-07-25, based on real sold listings (junkpal.ai)"