Components quality is the key important for any electronics devices.
We also had a lot of problems for the components purchased from non-Authorized Distributors before.In 2017, we had two projects rejected with the bad electronic components. MAX485ECSA is the big problem,it made us and our customer on a fire position. There are many many fake/used parts,MAX part is just one of them.
In 2019,we have improved our purchasing process, for the key components--chip,MCU or any other components which you required,we will buy from authorized distributors,eg,digikey,mouser,etc.
Here are some components we purchased from Mouser directly.Do not worry about our components quality now.We will follow your part number and get the original&new parts to assemble.