Online computer and parts seller

Home users, gamers, students and small businesses who want advice and a trusted seller rather than a faceless warehouse.

Margin on items sold, plus extra for building, testing and pre-configuring machines. A niche focus often works better than competing on price.

• Building and testing computers
• Online listings, photos and customer messages
• Packing and posting fragile items safely

• Distance selling rules give online customers a right to cancel; check the current consumer rights guidance
• Register as a sole trader or company; check whether you need to register with your local council or your landlord if working from home
• Selling electrical goods may bring WEEE (electronic waste) obligations; check the producer and distributor rules
• Stock and parcel insurance, plus public liability if customers collect
• Counterfeit or stolen parts, so buy only from reputable suppliers and keep invoices
• Price competition from large online retailers

Estimates suggest startup costs are typically around £1,000 to £8,000, depending on your product range, how much stock you buy and your website or marketplace setup. Many owners start with a focused range to limit risk.

Monthly revenue is typically estimated at around £500 to £5,000, depending on your range, pricing and the hours you put in. Price competition from large online retailers is worth planning for.

Check distance selling rules, which give online customers a right to cancel. Also check how to register as a sole trader or company, any WEEE obligations for electrical goods, insurance, and whether working from home needs permission.