Decide with method

Online purchase guides

Quick answers, then detailed methods for each step: choose a seller, compare an offer, pay, receive, return, terminate or buy internationally.

Choose a checklist according to your shopping situation · Fill in a comparison grid · Understanding the terms of offers

Daily objects illustrating guides to compare and prepare online purchases
Tips adapted to each product type and step of the order.AI-generated illustration.

How to use these contents

Leave your decision, not a promotion

Choose the guide that matches the current blocking point. Each page starts with a synthetic answer, continues with a checklist and ends with useful sources. You can get a marker in a minute or deepen before an important command.

Find a guide by need

24 guide(s) pour High-tech & informatique. Remove filters

Route 01

Identify shop and seller

Control the field, opinions, promises and actors involved in the sale.

Illustration generated by IA.
01

Reliability of a merchant site

Check an online shop

A method of 7 checks to evaluate a merchant site before paying: identity, domain, offer, payment, delivery, returns and reputation.

  • Find a company name, address and consistent means of contact.
  • Control the spelling and apparent seniority of the domain without confusing HTTPS with trust.
  • Read the fees, deadlines, returns and guarantees before opening the payment page.
Read the guide

Check the checklist : Check an online shop

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02

Market places

Buy on a marketplace

Platform, seller, sender: Learn how to distinguish roles on a marketplace and compare an offer before ordering.

  • Open the seller's profile and read its available contact details.
  • Distinguish seller, platform, sender and payment provider.
  • Compare the conditions attached to the precise offer.
Read the guide

Check the checklist : Buy on a marketplace

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06

Second hand between individuals

Buy from a private seller

Announcement, identity, status, payment and delivery: a concrete method to verify and document a second-hand purchase from an individual.

  • Keep the exchanges in the intended course.
  • Require photos and information about the real object.
  • Test essential functions before delivery.
Read the guide

Check the checklist : Buy between individuals

Route 02

Compare an offer or a contract

Reconciliation of full costs, conditions and services actually included.

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07

Comparison of offers

Compare the total cost

Calculate the real cost of an order by comparing the price delivered, the time, returns, warranty and services included, not just the discount displayed.

  • Compare an identical reference and condition.
  • Add product, delivery, installation and essential options.
  • Valorize the time, return and after-sales service according to his/her need.
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Check the checklist : Compare the total cost

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09

Telecommunications and subscriptions

Compare mobile and broadband plans

Coverage, eligibility, debit, price after promotion, commitment and equipment: compare a telecom offer according to your address and usage.

  • Test coverage and eligibility for use.
  • Dimension data, debit and useful services.
  • Calculate the cost after promotion and with the fees.
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Check the checklist : Compare a package or a box

AI-generated illustration. Framed vignette.
11

Professional procurement

Choose business SaaS software

Compare functions, cost per user, limits, contract, security and data export before you subscribe to professional software online.

  • Test three concrete scenarios with fictitious data.
  • Calculate the team's annual total.
  • Formalize data responsibilities.
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Check the checklist : Choose a professional SaaS software

Route 03

Choose by product

Check the characteristics that change depending on use, security or delivery.

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12

Second hand

Second-hand or refurbished

Condition, battery, accessories, warranty and seller: a convenient checklist to compare a used or reconditioned product before purchase.

  • Read the definition of the grade specific to each seller.
  • Identify the professional or special status of the seller.
  • Check battery, accessories, compatibility and locking.
Read the guide

Check the checklist : Used or reconditioned

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13

Before a new purchase

Repair or replace an appliance

A method for comparing diagnostic, repair estimate, new or reconditioned replacement, cost of use and life uncertainty.

  • Describe the symptom and keep the exact reference.
  • Ask for a quote that separates diagnostics, parts, labour and transport.
  • Compare the same service over the same duration.
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Check the checklist : Repair or replace a device

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16

Compare characteristics and costs

USB-C chargers and cables: check compatible features

Compare the power, ports, load sharing, cable length, and data or video functions required.

  • See the features of the appliance before the accessories.
  • Read the power sharing table, not just the facade value.
  • Do not deduce the functions of the USB-C form alone.
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Check the checklist : Charger and USB-C cable: check compatible functions

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17

Compare characteristics and costs

Printers: consumable compatibility and cost per page

Compare the cartridges, advertised yields, useful functions and recurring costs before choosing a printer.

  • Compare devices for the same volume and documents.
  • Check consumables with the exact model.
  • Keep the same method of return between offers.
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Check the checklist : Printer: consumables compatibility and cost per page

AI-generated illustration. Framed vignette.
18

Home Internet

Improve your home Wi-Fi

Distinguish internet and Wi-Fi coverage, compare measurements per room and choose a repeater or a suitable network after the first checks.

  • Distinguish internet connection and indoor network.
  • Measure several parts under the same conditions.
  • Optimize the location before purchasing.
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Check the checklist : Improving the Wi-Fi of housing

Route 04

Travel, plants, audio and games

Concrete methods for comparing formats, compatibilitys and conditions of use.

Route 05

Pay, receive and solve a problem

Secure the route, keep the evidence and know what to check after the order.

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23

Order receipt

Resolve a delivery problem

Promised date, follow-up, reservation, unreceived package: organize the evidence, formulate a clear timeline and send the request to the right contact.

  • Keep the date or deadline promised.
  • Address the seller for the proper execution of the order.
  • Photograph packages, labels and contents in case of damage.
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Check the checklist : Manage a delivery problem

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24

Defective product

Make a warranty claim

Default, proof of purchase, repair, replacement and commercial warranty: arrange a clear request with the right contact person.

  • First address the professional seller for compliance.
  • Distinguish legal guarantee, commercial guarantee and SAV.
  • Describe the defect with proportionate evidence.
Read the guide

Check the checklist : Play a guarantee

Need an overview?

The four-step shopping route

The general shopping guide links verification, comparison, marketplace and retention of proofs in a single method.

See the complete method

Frequently Asked Questions

About the guides

Which guide to start before a first purchase?

Start with the store check, then use the total cost comparison guide to split the selected offers.

Do the guides recommend merchants?

No. They provide independent decision-making criteria and refer to the directory to discover several actors without establishing a commercial ranking.

Do legal information replace personalized advice?

No. The pages explain general benchmarks and refer to current public sources to verify the rules applicable to a specific situation.