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.
See the full Ko Cossaar record on OpeningBid — images, provenance, fair estimates and free sale alerts.
View Ko Cossaar on OpeningBid →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. See the full sale history on OpeningBid.
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).
See the full Ko Cossaar record on OpeningBid — images, provenance, fair estimates and free sale alerts.
View Ko Cossaar on OpeningBid →