Median recorded eBay sale price for each quarter with 3 or more sales. Dashed line marks the last us retail (2011).
Investment scorecard
Momentum41Measured 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.
Liquidity60How easily it sells: recorded sales in the last 12 months (300 or more scores 100) and eBay's 90-day sell-through rate.
Scarcity40Demand 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 entry50Where 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
The Montbrillant Datora reference A21330 is no longer in Breitling's current US catalog, so it trades only on the resale market. Its last US retail on record is $5,835 (2011).
30 recorded eBay sales in the last 12 months, with a typical sale of $3,297.
Our verdict: Sells for about 43% under its $5,835 last retail. 30 recorded eBay sales in the last 12 months, and prices are down 3% over the year.
How much is a Breitling Montbrillant Datora A21330 worth?
Recorded eBay sales from the last 12 months put the typical Breitling Montbrillant Datora A21330 at $3,297, with the middle half selling between $3,100 and $3,700 (30 sales). Condition, box and papers move the price within that range.
Does the Breitling Montbrillant Datora A21330 sell above retail?
No. The typical sale of $3,297 is about 43% below the $5,835 retail (2011).
Is the Breitling Montbrillant Datora A21330 a good investment?
The Crown Index grades it D- (48/100) from real resale data, and today's call is wear, not invest. Weak resale; buy it to wear, not to make money. Past prices are not a forecast.