Mastemon Hackers' Slumber Secret Rare Digimon card — value and price

Mastemon

Hackers' Slumber · Secret Rare
Digimon dgm:651090 TCGplayer (daily snapshot, 2026-09-07)
Fair market value
$6.31
Consensus of 1 market price guide. Typical $4.10 – $8.48.
▼ 43% · 47d
Sources: TCGplayer (daily snapshot, 2026-09-07) · Near Mint, raw
Optimal buy
$5.50
Never pay above $5.94
Optimal sell
$6.70
Never sell below $6.43
Buy this card · aim to pay under $5.94
TCGplayer →Find on eBay →Graded (PSA 10) →Amazon: sealed →

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Selling this card
Optimal sell $6.70 · never below $6.43. Value your copy for the live net-after-fees calculator.
Where to sell
eBay~13.25% + $0.30Largest audience; on any listing use “Sell one like this” to prefill yours.TCGplayer~10–11%Best for singles; buyers expect competitive, data-driven pricing.
Shipping & protection supplies
Low value — a sleeve in a plain/bubble mailer is plenty; tracking optional under ~$20.
Penny sleevesBubble mailers

Amazon Business Free to join and gives bulk pricing on sleeves, toploaders and mailers — worth it if you ship cards often.

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Common questions
How much is Mastemon worth?

Mastemon from Hackers' Slumber has a fair market value of about $6.31 (Near Mint, raw), based on a consensus of current market price guides.

What is the best price to sell Mastemon?

List around $6.70 to clear without leaving money on the table; that nets about $4.43 after fees and shipping.

What should I pay to buy Mastemon?

A disciplined buy target is about $5.50 — a discount to fair value that keeps an edge. Aim not to pay above $5.94.

Where can I buy Mastemon?

Mastemon is sold on eBay, TCGplayer, and Amazon. Compare live listings against the fair value of $6.31 and aim to pay under $5.94 — SplitShot links you straight to current listings at each marketplace.

Is now a good time to buy Mastemon?

Mastemon is trending falling ~16% (7d vs 30d) lately. A disciplined entry is under $5.94; paying near or below $5.50 keeps a margin of safety versus the $6.31 fair value.

Estimate for guidance, not an appraisal. Value your exact copy →