How can I choose a cheap but high-quality bike?

[PatDennis]

 

Hi everybody
Talking about the issue of cheap bicycles, but the quality must meet today's standards, there are many promotions, but not all stores are reputable and quality. item following item
                    1 https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjFz- _S3LzwAhUPwJQKHZB6CEg&FjAAegQIAxAD&url=httdounts%3A%2F%2 = AOvVaw1L6uvTgs1KiTi2RGIx6e5C  
                    2 https://www.nashbar.com/bikes-frames/c14941
                    3 https://www.rei.com/c/bikes
                    4 https://go.skimresources.com/?id=68756X1559477&isjs=1&jv=15.1.0-stackpath&sref=https%3A%2F%2Fwww.tripsavvy.com%2Fbest-places-to-buy-bikes-4782776&url=https% 3A% 2F% 2Fwww.moosejaw.com% 2Fsearch% 2Fgravel-bikes & xguid = & xs = 1 & xtz = -420 & xuuid = 09dd681e72a7416fb6c9e1b87b55f1ca & xcust = 4782776% 7Cn8468f5088216471cbac9%

Thank you eviebody