No business-school language. No assuming you already know what ROI, margin or SKU means. Start with the question in front of you.
You do not need to read these in order.
Start with a few items you understand, record the costs, list clearly and learn from what actually sells.
Buy things you can recognise, check and price. A cheap item is not automatically a good buy.
Use sold prices as your starting point, then adjust for condition, demand and how quickly you want it gone.
Profit is the money left after the costs of making the sale. Sale price is not the same thing as profit.
ROI tells you how hard the money you spent on stock worked for you.
A good listing makes it easy for a buyer to know exactly what the item is and what condition it is in.
Check visibility, photos, price and demand one at a time before assuming the item is bad.
Keep records if you buy items to resell for profit, and use HMRC guidance for your own tax position.
A small repeatable routine is easier than constantly wondering what to do next.
Plain-English meanings for the reseller words you see most often.
Start with the marketplace that matches the type of stock you already understand instead of opening four accounts at once.
You can learn with a very small stock budget. The goal is to prove you can buy, list, sell and track profit before putting more cash into stock.
Look at completed or sold results where the marketplace provides them, not just the prices sellers are currently asking.
Work backwards from a realistic sale price and the profit you want, then subtract every expected selling cost.
Use the words a buyer would actually search: brand, item type, key style, size and one useful detail.
Show the whole item clearly, then the details a buyer would need to check before paying.
Protect the item from the normal knocks, rain and pressure it may face in the delivery network without wasting money on packaging.
Know who pays, what the parcel size will be and what the label actually costs before you accept a low offer.
Decide your lowest sensible price before the offer arrives so you do not make the decision emotionally.
Keep the sale record, the original condition evidence and the return outcome together so one return does not wreck your records.
Give every item a simple location code so you can find it quickly when it sells.
A SKU is just your own short code for identifying a stock item.
Sell-through tells you how much of your available stock actually sold during a period.
It is money you have already spent that has not come back to you through sales yet.
Revenue is the sales money coming in. Profit is what remains after costs.
Profit margin tells you what percentage of the sale money was left as profit.
Batch the repetitive parts of listing so each item does not become a separate mini-project.
Go sourcing with a budget and a short buy list, not just the hope of finding bargains.
Reduce the price when the evidence says price is the likely problem, not simply because a few days have passed.
Pause sourcing when stock is growing faster than sales, cash is tight or you cannot keep up with listing and storage.
Use the problem-fixing library for slow sales, low offers, weak profit, Vinted, eBay, Etsy and Whatnot.
