Saving less than 1% may not be worth your time in case of any problem. But often the difference will be much higher, and then it becomes a question of how much

Saving less than 1% may not be worth your time in case of any problem. But often the difference will be much higher, and then it becomes a question of how much risk you're taking versus the savings. One thing you can do is leave bad feedback, which encourages sellers to behave. Also, before ordering, just glance at the feedback for the seller. I doubt that your router horror story was with a seller with >95% feedback and >50 feedbacks. Takes a minute more and reduces the risk. Or, restrict purchases to FBA, which has customer service by Amazon.