Example scenario · illustrative, not a real seller
An example seller compares two fee percentages but has not checked whether either platform permits the item. Reverse the comparison: first permission and fulfilment, then costs.
What you’ll get
- Eliminate routes that do not fit the actual product.
- Find platform-specific published guidance.
- Compare costs without pretending demand is equal.
Compare the same decision, not two headlines
A fee percentage belongs to a specific base and scope. Account type, category, shipping allocation and optional services can change the comparison. Use each platform's current official information before treating a number as applicable.
The individual platform workbenches explain their own product and fulfilment questions. They are independent educational resources, not platform affiliations.
Worked example: lower receipts can leave more operating room
In one chosen model, $70 receipts less $24 other costs leaves $46 before acquisition. Another gives $64 less $16, leaving $48. The second is ahead by $2 in the model even though the receipts are lower.
Neither receipts assumption is observed demand. Relevant completed-sale evidence and a feasible fulfilment plan must support the scenario before it informs a real decision.
Cross-list only with one stock truth
Several marketplaces can create several commitments to the same physical unit. If you choose cross-listing, retain one stock identity and update other offers promptly when a sale commits the item.
A useful comparison ends with a workable offer, not a winner badge. Recheck the route when policies, stock condition or your fulfilment capacity change.
Worked example · hypothetical, not a real seller
Keep the example in view
| Chosen route comparison | Amount before acquisition |
|---|---|
| $70 receipts less $24 other costs | $46 |
| $64 receipts less $16 other costs | $48 |
| Difference in this model | $2 |
Before the next transaction
With JavaScript and browser storage, only checked-step IDs can stay on this device. No buyer details or amounts are saved.
Practical questions
Which platforms does the fee calculator model?
It includes explicitly scoped US eBay, Mercari and Poshmark profiles. Other routes require their own verified terms and can use editable cost assumptions; no unsupported rates are supplied.
Will a lower fee guarantee a better result?
No. Item price, demand, fulfilment costs, time and transaction risk can differ. A calculator does not establish that a buyer or sale exists.
Do this next · one concrete move