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The most valuable Castle Knights' Kingdom I LEGO sets by current market value. This list ranks 19 sets by current BrickPicker value, refreshed from live market data. Right now the top spot belongs to King Leo's Castle at $1,459. The top 5 alone account for about 70% of the value on this list. Every entry links to its full price history and marketplace listings. Updated 2026-07-21.
Top 5 hold 70% of this list's value ($4,262).
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| Name | / piece | |||
|---|---|---|---|---|
| 1 |  King Leo's Castle Castle · 2000 | $1,459 | +1522% | $2.76 |
| 2 |  King Leo's Castle Castle · 2000 | $860 | +856% | $1.63 |
| 3 |  King Leo's Spear Cart Castle · 2000 | $270 | +13468% | $12.27 |
| 4 |  Bull's Attack Castle · 2000 | $200 | +300% | $0.64 |
| 5 |  Richard's Arrowseat Castle · 2000 | $199 | — | $13.26 |
| 6 |  Weezil's Stone Bomber Castle · 2000 | $196 | — | $8.92 |
| 7 |  Bull's Fire Attacker Castle · 2000 | $191 | — | $7.94 |
| 8 |  Dragon Rider Castle · 2000 | $144 | +2777% | $13.05 |
| 9 |  Dungeon Castle · 2000 | $120 | +2305% | $3.16 |
| 10 |  Royal Joust Castle · 2000 | $108 | +438% | $1.06 |
| 11 |  Bulls' Attack Wagon Castle · 2000 | $100 | +1895% | $2.03 |
| 12 |  Knights' Catapult Castle · 2000 | $93 | +1772% | $1.87 |
| 13 |  Guarded Treasure Castle · 2000 | $90 | +500% | $0.87 |
| 14 |  King Leo Castle · 2000 | $50 | +902% | $2.38 |
| 15 |  Catapult Crusher Castle · 2000 | $45 | +651% | $0.80 |
| 16 |  Defense Archer Castle · 2000 | $44 | +2138% | $2.91 |
| 17 |  Fire Attack Castle · 2000 | $41 | +1982% | $1.69 |
| 18 |  Axe Cart Castle · 2000 | $30 | +903% | $1.07 |
| 19 |  Defense Archer Castle · 2000 | $24 | +1131% | $1.60 |
The 6098 King Leo's Castle is the most valuable, worth about $1,459 on the current market.
Around $1,459 — that's the current BrickPicker value of the 6098 King Leo's Castle, the top-ranked set on this list.
This list ranks 19 castle knights' kingdom i lego sets by current market value, refreshed from live sales data.