I'd go with "better judgement"
But seriously, I would say, go with something that's got warranty. The good thing about it, if it has issues and not functioning perfectly, you can always bring it back and ask for a replacement or refund. I always check what is covered and for how long. There are sellers who put their products or accessories on these carwashes, seen quite a few of those -- those do not have warranty. Bottom line, always check and use better judgement.
And this rule does not only apply to buying car adapter chargers, but all accessories for that matter from a retailer or e-tailer, always ask about the warranty on the product. Knowing how to contact and or how to go about replacement is a good information to have.