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Milon's Secret Castle (NES) cover art

NES · 1986

Milon's Secret Castle

versionNTSC-U
£30
CIB, complete in box
sold £22 to £34 · highest recorded sale £56Cardboard box: its condition moves the price most
◐ good sample · 13 sales
◀ common · cheaperdrag, tap or use ← → · every condition priced & ratedrarer · pricier ▶
Sold prices are US-dollar sales, shown in GBP at the 2026-10-23 ECB reference rate (US$1 = £0.75).

These are estimates from online sold-price data, across all regions. They’re a guide, not an offer: a game is worth what someone pays for it, and shops, markets and local sales can be higher or lower. Condition, photos and the seller’s reputation move a price within the range.

Search CIB on eBay 🇬🇧 ↳ auto-set to your region · change anytime

Milon's Secret Castle (NES, NTSC-U) sells for about £30 complete in box (13 sales, good sample), £9 loose. Sealed graded copies: £247.

Why £30 for cib?

every factor, from real sales · changes with the condition you pick

Sales behind it13CIB sales of the US version Middle half £22 to £34 · highest recorded £56
How sure we are◐ Good sample13 sales: enough for a fair price, not yet a tight one. Rated good.How prices are rated →
Condition ladder
Loose£9 
CIB£303.4× loose
The same game, the same version: what the box, the manual and the seal add.

On eBay right now: CIB

0 live · UK · refreshed just now

Check the latest CIB copies on eBay 🇬🇧
sells for £30
£22
quick sale · auction
£56
mint · highest recorded sale

Asks run higher than final sales. The green mark is what a CIB copy actually sells for. Click any listing to verify and buy on your own eBay.

From collectors

What collectors paid for Milon's Secret Castle

Sales collectors logged themselves, each checked by a person before it shows. Their number in their money: never mixed into our estimate.

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Graded
WATA · CGC · VGA · PSA · UKG · every grade priced

    
Graded · WATA · CGC · VGA · PSA · UKG

    
What a graded copy sells for
From 1 graded sale of the US version, each brought to today's money.

      
Version

    

      
The graded scale
Each bar runs from the grades most copies are in, low to high. Every dot is one sale, stacked with the others in its price band (today's money); the faint lines are this version's ungraded prices.

        

      
Sealedgrades 8.0 to 9.8 · 1 sale

        
8.09.8

        
£203 to £455all companiesCheck latest on eBay →
£10£20£50£100£200£500Loose £9CIB £30

      
sealed saleopened salecart or disc onlylisting didn't say, placed by its pricefar from the usual pricere-release, special edition or first print

    

    
Pick a grade
Any company, any grade: the price today and the range most sales fall in.

      
      

        
Copy

        
Company
Seal

        
9.0

        
£247most sales £176 to £352

        
EstimateNo WATA 9.0 sale yet. Worked out from this game's 1 sealed sale and what each grade step is worth across every game.

        Check the latest WATA 9.0 sealed on eBay 🇬🇧
      

      WATA sealed: price by grade · band = where most sales fall · rings = grades that sold, with how many
      £100£200£500£1,000
      6.07.08.08.59.09.49.810.0
      
      11 sale at WATA 9.4
      

    
Every grade
Each company's price for every grade of this copy. Bold prices have sold; the rest are estimates from the curve.

      
GradeWATACGCVGAPSAUKG
10.0 / 100
9.8··
9.6··
9.5 / 95···
9.4··
9.2··
9.0 / 90
8.5 / 85
8.0 / 80
7.5 / 75
7.0 / 70
6.5 / 65
6.0 / 60
Tap a price to see it in the grade picker. Sealed prices assume an A+ seal rating.

    
Today's money
The graded market moved a lot: copies sold in 2021 (second half) went for 1.5 times today's prices. Every sale is brought to today's level before it counts.

        
        today = 1.0
        1.5×
        20162026

      
One curve, every grade
Each price comes from all of this game's graded sales together, never one sale per grade. What a grade step is worth is learned from every graded sale on the site.

        
  • WATA 9.8 sealed: 1.84× a 9.0
  • WATA 10 sealed: 3.38× a 9.0
  • A seal rated C: 0.53× an A+
  • Opened WATA 9.4: 1.28× a 9.0

      
Left out of this version
No sale of the US version was left out.

        
    
    
    Graded prices are today's, converted from US dollars like every sold price on this page: every graded sale of this game, older sales brought to today's market level. We never claim to authenticate a slab or a seal.
    
    
  
    
  
    
    
    What is Milon's Secret Castle (NES) worth?
    
    
    Milon's Secret Castle on NES is estimated here by condition and region from sold-price data, each rated for confidence. Loose carts, complete-in-box (CIB), sealed and graded copies each sell for very different amounts, and PAL and NTSC are separate markets we never average together.
    
    
    How much is Milon's Secret Castle (NES) worth?
    Milon's Secret Castle (NES, NTSC-U) sells for about £30 complete in box (13 sales, good sample), £9 loose. Sealed graded copies: £247. These are sold-price estimates for the NTSC-U version.
    Is a loose Milon's Secret Castle cart worth anything?
    A loose NTSC-U cart sells for about £9 (11 sales, good sample). A complete-in-box copy sells for about £30.
    
  
    
  
    
    
    How this number is made, and why it's better. Sold-price estimates, split by region & condition, cleaned of bootlegs and bundles with every exclusion shown, plus specialist pricing on the games we know deeply. Every condition gets a price, honestly rated. Live eBay asks shown separately, and the buy link goes to your own country's eBay. Full methodology →
    
    
    • a price on every condition
    • each rated for confidence
    • region & language split
    • exclusions shown
    • your local eBay
    • same number for everyone
    
  
    
  
    For AI agents: this page as data
    
    /game/nes/milons-secret-castle.md the prices as an intents.md feed ·
    /game/nes/milons-secret-castle/intents.md open buy/sell intents ·
    /api/price JSON ·
    /mcp · /agents.md