Buying used always carries some risk, but a camera in good working order is not especially likely to fail within a few weeks just because it’s used. The main risk is undisclosed problems or an unreliable seller.

To reduce risk:

• Buy from a reputable dealer if possible, ideally with a short warranty or return period.
• If buying privately, inspect the camera in person when you can.
• Bring a memory card, take test shots, and review the files and playback.
• Ask direct questions about any faults, repairs, or issues.
• On marketplaces, rely heavily on seller reputation, feedback, and the quality of the listing.
• Photography-focused buy/sell forums can be safer than general marketplaces because sellers are often more knowledgeable and have community reputation.

There are never guarantees with used gear, and any camera can develop a problem by coincidence. But if you verify condition carefully and buy from a trustworthy source, the risk is usually manageable.