I bought used a 2019 16in Macbook pro last year; it lasted 4 months and the screen went dead; replacement os that screen costs $700+, which is almost as much as ipaid for the whole laptop. so I waited unter cyber deals and bought another of the same model / year. OMFG!!! The second one also was defective, will not boot up, attempt to boot / fail cycle. I immediately started a return. This 2019 model was designed with the mini USB-C charger, thereafter Apple resumed the magSafe chargers. ??? APPLE products are usually reliable, I Wonder if it has something to do with the charging infrastructure. Anyhow these Laptops came from 2 different sellers #1-SupremeDealsCR  #2-Chrome Source. buyers beware!!!