Windmill Engineer — Foil Mercurial Heart Uncommon Grand Archive card — value and price

Photo is the marketplace stock image and may show either finish — this value is for the Foil printing.

Windmill Engineer — Foil

Mercurial Heart · Uncommon
Grand Archive gra:549931 TCGplayer (daily snapshot, 2026-08-05)
Fair market value
$21.85
Consensus of 1 market price guide. Typical $18.93 – $24.89.
Sources: TCGplayer (daily snapshot, 2026-08-05) · Near Mint, raw
Optimal buy
$20.24
Never pay above $21.12
Optimal sell
$23.05
Never sell below $22.21
Buy this card · aim to pay under $21.12
Find on eBay →TCGplayer →Buy on Amazon →Graded (PSA 10) →
When it arrives: a penny sleeve + toploader is all it takes to keep it Near Mint.
Penny sleevesToploaders

We may earn a commission on purchases — at no extra cost to you, and it never affects our valuations.

</> Embed this card / add a value badge
SplitShot value badge
Badge — HTML<a href="https://splitshot.co/card/gra:549931"><img src="https://splitshot.co/badge/gra:549931.svg" alt="SplitShot value"></a>
Badge — Markdown[![SplitShot value](https://splitshot.co/badge/gra:549931.svg)](https://splitshot.co/card/gra:549931)
Widget — iframe<iframe src="https://splitshot.co/embed/gra:549931" width="360" height="172" style="border:0;overflow:hidden" loading="lazy" title="SplitShot value"></iframe>

Free to use anywhere — forum signatures, blogs, wikis. The value updates automatically. Note: eBay's listing policy allows externally-hosted images but not links off-site, so use the badge image alone there, without the link.

On Discord, skip the snippets entirely — add the SplitShot app and type /value in any channel.

Selling this card
Optimal sell $23.05 · never below $22.21. 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.Whatnot~8% + paymentLive-auction app; strong for breaks, lots, and fast sales.
Shipping & protection supplies
Sleeve + toploader in a team bag, taped inside a bubble mailer, shipped with tracking.
Penny sleevesToploadersTeam bagsBubble mailersPainter’s tape
Related cards
Windmill Engineer cardWindmill EngineerPromotional Cards$145.00Tideholder Claymore cardTideholder ClaymoreMercurial Heart$22.47Icebound Slam cardIcebound SlamMercurial Heart$20.99Seaside Ringleader cardSeaside RingleaderMercurial Heart$23.24Powercell (64B) cardPowercell (64B)Mercurial Heart$19.37Tristan, Underhanded cardTristan, UnderhandedMercurial Heart$23.60
All Windmill Engineer printings →More Mercurial Heart →
Common questions
How much is Windmill Engineer — Foil worth?

Windmill Engineer — Foil from Mercurial Heart has a fair market value of about $21.85 (Near Mint, raw), based on a consensus of current market price guides.

What is the best price to sell Windmill Engineer — Foil?

List around $23.05 to clear without leaving money on the table; that nets about $14.65 after fees and shipping.

What should I pay to buy Windmill Engineer — Foil?

A disciplined buy target is about $20.24 — a discount to fair value that keeps an edge. Aim not to pay above $21.12.

Where can I buy Windmill Engineer — Foil?

Windmill Engineer — Foil is sold on eBay, TCGplayer, and Amazon. Compare live listings against the fair value of $21.85 and aim to pay under $21.12 — SplitShot links you straight to current listings at each marketplace.

Is now a good time to buy Windmill Engineer — Foil?

Windmill Engineer — Foil is trending stable lately. A disciplined entry is under $21.12; paying near or below $20.24 keeps a margin of safety versus the $21.85 fair value.

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