Know your costs before you list
The most expensive shipping mistake happens before the sale: listing an item without knowing what it will cost to send. Pack the item, or a close stand-in, then weigh and measure the package. Many carriers price by both weight and size, so a light but bulky box can cost more than you expect. Use that number when you set your price or shipping charge. Our guide to what you keep after selling shows how shipping fits into your profit.
Get the right tools
- A shipping scale: an accurate digital scale prevents underpaying, which can lead to extra charges, and overpaying.
- A tape measure: for length, width and height of the packed box.
- A small packaging stock: poly mailers, padded mailers and boxes in a few common sizes.
- Padding: bubble wrap, packing paper or air pillows.
- A printer for labels: optional but convenient. Some services also offer label printing at drop-off.
Pack smaller and lighter
- Use the smallest safe package. Leave room for padding on all sides, but no more.
- Use mailers for soft goods. Clothing and other soft, unbreakable items usually ship well in poly mailers, which weigh little.
- Cut boxes down. If a box is too tall, score and fold it to fit the item.
- Choose light padding. Air pillows and paper weigh less than heavy filler.
- Remove extras. Original packaging, display stands or heavy accessories add weight. Include them only if they add value for the buyer.
Reuse packaging safely
Clean, sturdy boxes and mailers from your own deliveries can be reused. Remove or fully cover old labels and barcodes so the package is not misrouted, and do not reuse boxes that are crushed or damp. Ask local shops whether they have clean packing materials they plan to throw away.
Compare shipping services
Different carriers and services suit different packages. Light, small items often have economical options, while heavy items may be cheaper with another carrier or service. Many marketplaces provide discounted labels you buy within the listing or sale, and carriers usually offer lower rates online than at a counter. Some carriers offer flat-rate boxes, which help with small, heavy items. Compare a few options for your typical package sizes once, then keep a short note of which works best.
Decide who pays for shipping
- Buyer pays: you charge the actual shipping cost. Clear and fair, but the total can look higher.
- Free shipping: the cost is built into your price. It can attract buyers, but you must include it in your math.
- Local pickup: no shipping at all, which suits bulky and heavy items. See pricing on Facebook Marketplace.
Whichever you choose, run the numbers through the free resale profit calculator so you know what you keep.
Protect fragile items
Saving on shipping is pointless if the item arrives broken. Wrap fragile items individually, fill empty space so nothing moves, and consider double boxing glass and ceramics. Mark the package as fragile, but pack as if nobody will read that label. Consider adding tracking and, for valuable items, insurance or declared value.
Save time as well as money
- Set up a packing station with supplies in reach.
- Ship in batches on set days.
- Schedule pickups where your carrier offers them.
- Keep records of tracking numbers until each sale is complete.
Put accurate shipping details in the listing
Many marketplaces ask for the package weight and dimensions when you list, then calculate the buyer's shipping cost or provide a label. Enter the packed weight and size, not the item's bare weight, and round up rather than down. State your handling time honestly, such as the number of business days before you ship, and stick to it. If you combine shipping for buyers who purchase several items, say so in your listings; it can encourage larger orders and saves you packing time.
Where WorthAI fits
Every WorthAI scan includes a profit calculator with guided fees and shipping, so you can see what you would keep before you list, and the most you should pay if you are buying to resell. Check the shipping estimate against your actual package weight and size before you rely on it.
Frequently asked questions
What is the cheapest way to ship clothes?
Usually a lightweight poly mailer with the clothing folded neatly inside a protective bag. Weigh the package and compare services for that weight.
Should I offer free shipping?
It can attract buyers, but the cost comes out of your sale. Include shipping in your price and check what you would keep before you decide.
Can I reuse boxes for shipping?
Yes, if they are clean and sturdy. Remove or completely cover old labels and barcodes, and do not use boxes that are crushed or damp.
How do I avoid extra shipping charges?
Weigh and measure the packed item accurately and buy the label for those exact numbers. Underestimating weight or size can lead to adjustments.