> Source: https://www.openingbid.art/artist/ko-cossaar · updated 2026-11-02

# Ko Cossaar (1874–1966)

Ko Cossaar is an artist with 10 auction lots recorded since 2020, median price $324. Some sold prices are hammer-only and exclude the buyer's premium; they are marked on this page.

A work by Ko Cossaar sold in 2025 for a hammer price of $833 (buyer's premium not included), according to OpeningBid's index of auction results.

## What is a Ko Cossaar work worth?

Across 6 sold lots tracked by OpeningBid, the median price of a Ko Cossaar work is $324.

The median Ko Cossaar work on paper sells for $439 across 2 lots.

The median Ko Cossaar painting sells for $324 across 4 lots.

Some prices are hammer-only and exclude the buyer's premium.

## Price breakdown by category

| Category | Lots tracked | Median price | Record price | Sell-through | Last sale |
|---|---|---|---|---|---|
| Paintings | 5 | $324† | $530† | 80% | 2025-08-25 |
| Works on Paper | 5 | $439† | $833† | 40% | 2026-06-29 |

† hammer price — buyer's premium not included.

## Notable results

| Medium | Year | Price |
|---|---|---|
| Works on Paper | 2025 | $833† |
| Paintings | 2023 | $530† |
| Paintings | 2022 | $414† |
| Works on Paper | 2026 | $46† |

† hammer price — buyer's premium not included.

The highest recorded result in each medium. The full sale history is in the OpeningBid app (free sign-up).

## Frequently asked questions

### What is a Ko Cossaar worth?

Across 6 sold lots tracked by OpeningBid, the median price of a Ko Cossaar work is $324. The median Ko Cossaar work on paper sells for $439 across 2 lots. The median Ko Cossaar painting sells for $324 across 4 lots. Some prices are hammer-only and exclude the buyer's premium.

### What is Ko Cossaar's auction record?

Ko Cossaar's auction record is $833, set in 2025. That record lot sold for a hammer price of $833 (buyer's premium not included).

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Data last updated 2026-11-02. OpeningBid tracks 15,390,829 auction lots from 577 auction houses, refreshed nightly.

Cite this page as: OpeningBid, “Ko Cossaar auction prices”, https://www.openingbid.art/artist/ko-cossaar (updated 2026-11-02).

Historical auction data, not investment advice. Prices are premium-inclusive USD where the buyer's premium is recorded. Figures marked † are hammer prices (buyer's premium not included); ‡ marks a price whose basis is not yet verified. Non-USD results are converted at the sale month's rate.