A critical mistake made by new sellers is calculating returns based on purchase price versus gross selling price. Marketplace fees steadily chip away at realized earnings. On eBay, standard categories carry base fees starting around 13.25%, but sellers who opt into promoted listing models surrender an additional 2% to 10% of the final transaction price just to remain visible in search results. Payment processing fees and mandatory tax collections inflate the buyer's checkout price, which in turn reduces how much buyers are willing to pay for the item itself.
Shipping weight presents another barrier to profitability. Carrier rate increases make items weighing over one pound expensive to move across regional zones. A heavy vintage stereo receiver picked up for $20 might command $90 on an online marketplace. However, after absorbing $32 in dimensional carrier postage, $8 in rigid bubble wrap and double-walled cardboard boxes, and $14 in platform cuts, the seller earns less than $16 for an hour of cleaning, packaging, and parcel drop-off.
For heavy, oversized, or fragile goods, local Facebook Marketplace listings provide a better financial alternative. While local buyers are known for erratic messaging and missed pickup times, local transactions bypass postal friction and seller commission fees entirely. Selling bulky goods locally for pure cash keeps net margins intact and removes the risk of postal shipping damage.
