Most resellers measure success with one number:
Profit.
You buy an item for £20, sell it for £60, and think:
“I made £40.”
But that number rarely reflects reality.
Because real profit includes far more than the difference between buy and sell price.
Fees, shipping, packaging, returns and — most importantly — time all reduce your actual earnings.
What looks like a £40 flip on paper can easily become £20–£25 after costs.
And that’s before we account for time.
Let’s say that flip took:
• 30 minutes to source
• 30 minutes to photograph and list
• 30 minutes to pack and ship
That’s 90 minutes of work.
If the real profit is £22, your actual earning becomes:
about £15 per hour.
Not £40.
When you start calculating profit per hour, your perspective changes quickly.
Some flips that look profitable suddenly become poor use of your time.
Another metric most resellers ignore is inventory speed.
Consider this:
A £50 profit item that sells in 2 days
can outperform
a £100 profit item that sits for 6 months.
Slow inventory creates hidden costs:
• tied up cash
• lost sourcing opportunities
• storage space
• reduced momentum
Fast inventory compounds.
Slow inventory stagnates.
Once you start tracking properly, new metrics become more important than simple profit.
Experienced resellers monitor:
Profit per hour
How efficiently time converts into earnings.
Sell-through rate
How quickly inventory sells.
Days in stock
How long capital stays tied up.
Inventory turnover
How quickly money cycles through the business.
Without these metrics, most resellers are simply guessing.
Many resellers celebrate revenue milestones.
£10k months.
£100k years.
But revenue alone tells you very little about the quality of a business.
Two sellers might generate the same revenue while operating completely different businesses.
One works 40 hours.
The other works 160.
Same revenue.
Very different outcomes.
Tracking changes the way you think.
Instead of asking:
“How much profit did I make?”
You start asking better questions:
• How long did this take?
• How quickly did it sell?
• What is my profit per hour?
• What inventory performs best?
These questions reveal patterns.
Patterns lead to better decisions.
Better decisions build better businesses.
Conclusion
The goal of reselling isn't just profit.
It's efficient profit.
Revenue is vanity.
Profit can lie.
Tracked data reveals truth.
To calculate real reselling profit, you must include every cost involved in the sale.
Most beginners only subtract the buy price from the sale price, but that misses several important costs.
A proper calculation includes:
• Buy price
• Platform fees (eBay, Vinted, etc.)
• Shipping costs
• Packaging materials
• Returns or damaged items
• Time spent sourcing, listing and shipping
When you track these numbers consistently, you stop guessing and start understanding which items actually make money.
Example of a Real Reselling Profit Calculation:
Item sold for £50
Buy price: £20
eBay fees: £6
Shipping: £3.50
Packaging: £1
Real profit: £19.50
Without tracking these numbers, many resellers believe they made £30 profit when the real number is much lower.
If you want to track these numbers automatically, you can use the Flipper’s Tool Kit, a spreadsheet built specifically for resellers who want to understand their real profit.
Track Your Real Profit
If you want a simple way to track real profit, time and inventory performance, try the Flipper’s Tool Kit.
It was built specifically for resellers who want to stop guessing and start tracking their numbers.