A seller's profit is fixed the moment the unit price is agreed. Advertising can raise volume and fulfilment can raise the delivery rate, but neither can recover a product bought too expensively.
This is where new sellers lose money most often: paying a local wholesaler's retail-adjacent price, then discovering the market will not bear the markup they need.
We work with over 500 vetted suppliers and can source a requested product in 24 to 48 hours. Sellers can also buy independently and ship to our warehouse — sourcing through us is optional. Where sellers use it, unit prices are typically 25–35% below what they reach alone, because the volume is pooled across thousands of sellers.