BAD MEXICAN AVOCADOS at Costco

We have bought avocados many times at Costcos but no more. Avocados at Costo are usually sold in bags of 5 and are usually from Mexico. After a few days they are ripe enough to eat but as they ripen there are usually 2-3 of the 5 that have bad areas that makes a third of the avocado inedible. This avocado not only had serious dark/bad areas but also had what appeared to be an internal circular growth. From now on we will pay more and only buy California Avocados.