Break vs Keep · Fee Calculator · Profit Analysis · Free
Set Break Profit Calculator
Should you break a complete set into singles or keep it intact? Calculate profit after platform fees, shipping, packaging, and time to decide.
Quick Start — Load a Set Preset
Set Details
Key Cards (Stars, Rookies, Inserts)
List the most valuable cards in the set. Everything else is calculated as commons at the bulk price above.
Selling Assumptions
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Enter a set cost and total cards above to calculate break profitability.
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Frequently Asked Questions
What is a set break in sports cards?+
A set break is when someone buys a complete set of cards and sells each card individually. The idea is that the sum of individual card values exceeds what you paid for the complete set. This is common with vintage sets, high-end modern sets, and sets with valuable rookies or star cards.
When is breaking a set profitable?+
Set breaks tend to be most profitable when: (1) the set has a few very high-value cards that carry most of the value, (2) complete set prices are depressed relative to individual card prices, (3) you can sell commons in bulk lots rather than one at a time, and (4) the set has strong collector demand for individual cards. Sets where value is evenly distributed are usually not worth breaking.
What costs should I factor into a set break?+
You need to account for: platform selling fees (eBay 13.25%, COMC 20%, MySlabs 5%), shipping costs per sale (typically $1-4 per card), packaging supplies ($0.25-1.00 per card), listing time, and potential unsold inventory. Many new breakers underestimate fees and time, which can turn a profitable-looking break into a loss.
How do I handle commons in a set break?+
Commons are the cards in a set that are not star players or rookies. Individually they are worth $0.25-$2 each, so selling them one-by-one is not worth your time. Most breakers sell commons in bulk lots of 25-100 cards at a discount. Our calculator lets you set a bulk price per common to reflect realistic revenue from the non-key cards.
Should I grade key cards before selling?+
Grading can significantly increase the value of key cards (rookies, star players) but adds $15-150 per card in cost and 1-12 months in turnaround time. Generally, grade cards worth $50+ raw that are in near-mint or better condition. Use our Grading ROI Calculator to evaluate specific cards before submitting.