Reseller Guides
Practical guides for UK resellers at every stage — from your first car boot find to a full-time income. Written to be useful, not impressive.
Most resellers look at the sale price and feel good about themselves. But once you subtract the platform fee, payment processing, postage, packaging, and what you actually paid for the item — the real number is often uncomfortable. That gap between what you sold it for and what you actually made is where reselling businesses quietly bleed out.
The formula is simple: Net Profit = Sale Price − (Platform Fee + Payment Fee + Postage + Packaging + Item Cost). Apply it to every sale and you'll immediately see which items and platforms are actually working for you.
On eBay UK, as a private seller, expect a final value fee of around 12.9% + 30p per transaction. On a £30 sale that's £4.17 gone before you've even thought about postage. Sell the same item on Vinted — where the buyer pays the fee — and your take-home is close to the full £30. Same item, very different margin.
Payment fees catch people out too. PayPal and most payment processors take around 2.9% + a fixed fee per transaction. On low-value items, this alone can wipe out your profit. On a £5 sale, you might net £3.50 after fees — then pay another £1.55 for postage. That's a 5p profit on a sale that felt fine.
Tracking this manually is painful, which is why most resellers don't do it until they realise they've been essentially working for nothing on certain lines. Fliplogger handles all of this automatically — log the sale, the fees, and the postage, and it shows you the real number. Every time.
HMRC won't chase you for selling a few old things from your loft. But once you're buying to resell, the rules change — and the threshold is lower than most people realise.
The £1,000 trading allowance means you can earn up to £1,000 gross from self-employment or casual trading in a tax year without declaring it. This resets every April. If your total reselling income stays below that, you don't need to do anything.
Above £1,000, you need to register as self-employed with HMRC and submit a Self Assessment tax return. You'll pay Income Tax on profits above your Personal Allowance (currently £12,570), plus Class 4 National Insurance. Profits, not turnover — so keep receipts for stock, packaging, and postage.
HMRC uses 'badges of trade' to decide whether you're trading or just selling personal possessions. The key indicators are: buying specifically to resell (not personal use), volume of transactions, and profit motive. If you're listing 50 items a month you bought at car boots, that's trading.
The safest approach: track every purchase and sale from day one, keep receipts, and don't wait until you've already exceeded the threshold before looking into it. Fliplogger handles the record-keeping side — registering with HMRC takes about 20 minutes online.
The best sourcing spots aren't secret — they're just underworked. Most resellers stick to one or two channels. Diversify and you'll find stock others miss.
Charity shops remain the most consistent source of margin for clothing resellers. Weekday mornings are best — stock is freshest and footfall is lowest. Build a relationship with staff at your regular shops and you'll sometimes get first look at donations before they hit the floor.
Car boot sales are high effort but high reward. Arrive early, bring cash, and don't be afraid to offer below the asking price — sellers are there to clear stuff, not haggle. Focus on branded items, vintage clothing, and anything with obvious resale value you can verify on the spot with your phone.
Facebook Marketplace's 'buy' side is underused by resellers. People list furniture, electronics, and job lots at prices that make no sense — often because they just want it gone. Set up search alerts for categories you know well.
Supermarket clearance sections (B&M, Home Bargains, TK Maxx) are solid for new-with-tags items. If something is 70% off retail and in perfect condition, there's usually a margin on eBay. Learn which categories move and check the 'sold' listings before you buy.
Postage is one of the biggest margin killers in reselling. A few straightforward habits can shave £1–£2 per parcel off your costs — which adds up fast at volume.
Royal Mail's size tiers are your most important numbers to memorise. Large Letter (max 35×25×2.5cm, 100g) starts from around £1.55 with Click & Drop. Small Parcel starts from around £3.35. The difference between a thick envelope and a small parcel is sometimes just a few millimetres — weigh and measure everything before listing.
Click & Drop gives you a discount versus buying postage over the counter at the Post Office, and you can print labels at home. Sign up for a Royal Mail account — it's free. For higher volumes, consider Parcel2Go or Sendcloud to compare carriers in one place.
Free packaging is everywhere once you look for it. Royal Mail will send you free Tracked 24/48 bags if you order online. Supermarkets leave boxes by the door. Bubble wrap and tissue paper from incoming deliveries can be reused. Every bit of packaging you don't buy is margin you keep.
Factor postage into your listing price before you list, not after. Many new resellers underestimate weight, get stung by the actual postage cost, and erode their profit on the sale. Weigh the item packaged, calculate the postage, then decide your price.
Asking price and selling price are very different things. The only number that matters is what buyers actually paid — and eBay shows you exactly that if you know where to look.
Before you list anything, search eBay for the item, then filter by 'Sold Listings' (under Buying Options in the left sidebar, or Show Only > Sold Items). This tells you what real buyers actually paid — not what sellers hoped to get. It's the most reliable pricing data available.
Start slightly below the average sold price if you want to move stock quickly, or match it if you're willing to wait. Condition matters: a small stain or missing box can drop the realistic price by 20–30%. Be honest in your listings — returns and negative feedback cost more than the extra £2.
Watchers are a useful signal. If you've had 10+ watchers and no sales after a week, your price is probably 10–15% too high. A small reduction often converts watchers to buyers. If you're getting zero watchers, the issue is usually photos or keywords, not price.
Bundle pricing increases your average order value and shifts stock faster. Group similar items (same brand, same size, same category) into lots — a lot of 5 T-shirts at £15 is often easier to sell than five individual listings at £4 each, and involves less packing and postage.
Real Hustle Help is the home of practical side hustle content — blogs, newsletters, and guides for people who want to earn more without the noise. Fliplogger is part of that ecosystem. If these guides were useful, there's plenty more where they came from.
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