I bought a Macbook Air M1 chip from this company Tech Exchange and am very disappointed in what they were selling. I have only had this macbook for 11 months and was experiencing problems when trying to update it. I go into the Apple store to find out the "Memory" function of the Macbook is completely depleted and will cost a lot to replace it. When trying to contact the company there has been no answer and nobody trying to help. Amazon should look into these companies more especially when selling larger financial items.