Tudor Black Bay GMT 79830RB

“Pepsi”

B+

Grade B+: solid, selectiveToday's call · Hold

Short termunder 1 yearStrongMid term1 to 3 yearsStrongLong term3+ yearsStrong

Rank #9 of 37 rated pieces in the Tudor Vault

Retail (2026)$5,275

Typical sale today$3,400Typical range $3,054 to $3,750

Vs retail-36%

1-year+3%

Market range: the middle half of 335 recorded eBay sales in the last 12 months.

Open in the interactive VaultLive eBay listings ↗︎

Market price history

Median recorded eBay sale price for each quarter with 3 or more sales. Dashed line marks the 2026 retail price.

Investment scorecard

Momentum58Measured price direction: the median recorded sale of the last 4 months against the median of 8 to 12 months ago. 50 means flat; small samples are pulled toward 50.

Liquidity100How easily it sells: recorded sales in the last 12 months (300 or more scores 100) and eBay's 90-day sell-through rate.

Scarcity29Demand against supply. For modern pieces, how far the market sits above or below current retail, plus a lift if production has ended. For vintage, how rarely one comes up for sale.

Value entry34Where the latest quarter's median sale sits inside its own 3-year range. Buying near the low scores high; buying at the high scores low.

Condition safety80How safe a typical example is: the age of the design, plus how tightly sale prices cluster (a wide spread means condition and originality swing the price).

The story

Tudor lists the Black Bay GMT reference 79830RB at $5,275 in the US (tudorwatch.com, November 2026).

335 recorded eBay sales in the last 12 months, with a typical sale of $3,400.

Our verdict: Sells for about 36% under its $5,275 boutique price. 335 recorded eBay sales in the last 12 months, and prices are up 3% over the year.

Configurations

Sizes	41mm
Case & bracelet	Stainless steel
Factory bracelet	Steel riveted bracelet or fabric strap
Factory bezels	Blue and burgundy 24-hour bezel
Notable dials	Black
Caliber
Production	Current model

Recent recorded sales

Sold	Example	Price
Nov 4, 2026	Pre-owned · eBay sale ↗︎	$3,059
Oct 30, 2026	New/unworn · eBay sale ↗︎	$4,010
Oct 30, 2026	New/unworn · eBay sale ↗︎	$4,375
Oct 29, 2026	Pre-owned · eBay sale ↗︎	$2,999
Oct 28, 2026	Pre-owned · eBay sale ↗︎	$2,950
Oct 13, 2026	Pre-owned · eBay sale ↗︎	$2,950

Recorded eBay completed sales, logged at our last data refresh.

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Quick answers

How much is a Tudor Black Bay GMT 79830RB worth?

Recorded eBay sales from the last 12 months put the typical Tudor Black Bay GMT 79830RB at $3,400, with the middle half selling between $3,054 and $3,750 (320 sales). Condition, box and papers move the price within that range.

Does the Tudor Black Bay GMT 79830RB sell above retail?

No. The typical sale of $3,400 is about 36% below the $5,275 retail price.

Is the Tudor Black Bay GMT 79830RB a good investment?

The Crown Index grades it B+ (78/100) from real resale data, and today's call is hold. Solid resale, with limited room to grow from today's price. Past prices are not a forecast.

Head to head

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