Median recorded eBay sale price for each quarter with 3 or more sales. Dashed line marks the 2026 retail price.
Investment scorecard
Momentum50Measured 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.
Liquidity76How easily it sells: recorded sales in the last 12 months (300 or more scores 100) and eBay's 90-day sell-through rate.
Scarcity24Demand 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 entry20Where 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 safety73How 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 Ceramic reference 79210CNU at $6,125 in the US (tudorwatch.com, November 2026).
74 recorded eBay sales in the last 12 months, with a typical sale of $3,350.
Our verdict: Sells for about 45% under its $6,125 boutique price. 74 recorded eBay sales in the last 12 months, with prices flat over the year.
How much is a Tudor Black Bay Ceramic 79210CNU worth?
Recorded eBay sales from the last 12 months put the typical Tudor Black Bay Ceramic 79210CNU at $3,350, with the middle half selling between $3,049 and $3,971 (69 sales). Condition, box and papers move the price within that range.
Does the Tudor Black Bay Ceramic 79210CNU sell above retail?
No. The typical sale of $3,350 is about 45% below the $6,125 retail price.
Is the Tudor Black Bay Ceramic 79210CNU a good investment?
The Crown Index grades it C (62/100) from real resale data, and today's call is watch. Middle-of-the-pack resale; fine to own, not one to buy expecting it to rise. Past prices are not a forecast.