How to judge the quality of online camera lens shop?

Judging the quality of online camera lens shop requires comprehensive consideration from the following dimensions:
Official channel verification
Prioritize choosing official flagship stores or authorized stores of the brand (such as Canon CPN, Nikon authorized dealers, etc.) to ensure that the product has a three in one code (body number, warranty card number, packaging number consistent), and supports official website registration verification.  ‌
Shop Qualification Evaluation
Check the deposit amount of the store (high deposit is more reliable) and the qualification of the business license to avoid choosing merchants with low deposit or no license. JD.com, Taobao and other platforms can view merchant qualifications and certificates, while individual sellers such as Xianyu need to judge their reputation through transaction records and evaluations.  ‌
Third party verification reference
Search for store complaint records through platforms such as Tieba and Black Cat Complaints to avoid selecting merchants with a large number of negative feedback.  ‌
Inspection process
Require merchants to provide physical photos and detailed parameters, and focus on inspecting the goods upon receipt
Appearance issues such as shell wear and screw hole detachment
Is there any dust or foreign objects inside the lens
Does the CMOS sensor have bad pixels (detected by taking pure black and white photos)
Does the system display the first-time boot interface
Price and channel risks
Be wary of low price traps (such as being cautious when the price difference of some Xianyu models exceeds 50%), official refurbished machine prices are usually higher than individual sellers but more secure. Offline second-hand shops can conduct on-site machine inspections, but it is important to note that the bargaining range should not be too large.