There’s plenty of seller advice on the internet and some of it even survives the math. Seller Deep Dives investigate real questions about pricing, profit, traffic, fees and platform decisions using research, data and seller math. We pull questions and debates from real seller communities, dig into the research, and run the numbers to find out what actually holds up.
Seller Fee Watch
When fees or shipping prices change, your profit math can change with them. Seller Fee Watch tracks confirmed changes across major selling platforms and carriers, then shows what sellers need to check.
What Would a 5% Promoted Listings Minimum Do to Your eBay Profit?
Some eBay sellers are seeing Promoted Listings rates below 5% rejected. Here’s what a move from 3% to 5% could actually do to seller profit.
Etsy Shipping Costs: Should You Raise Prices in October?
Etsy shipping costs may rise when USPS holiday prices begin October 4. Should you absorb the increase, raise your item price, or charge more for shipping? See what each choice leaves you after fees.
Are Etsy Sales Really Down in 2026? What the Numbers Actually Say
Etsy says marketplace sales are growing, while sellers across online communities say traffic and orders are falling. We looked at Etsy’s 2026 data to understand how both can be true.
$32 + Shipping vs $38 Free Shipping: Which Etsy Price Actually Converts Better?
A lower Etsy item price may get the click, but free shipping may reduce checkout friction. Here is how to compare $32 plus shipping against $38 free shipping using buyer behavior, Etsy fee rules, and seller profit math.