Andy Rubin, the father of Google’s Android OS, is reportedly looking for a buyer for his Essential smartphone company. Essential 2 phone development has been cancelled, and sales of the original model haven’t topped 150,000 units. The idea of a pure Android smartphone with expandability through accessories was appealing in concept, but not in practice considering Essential’s price dropped from US$699 to $200 before and sales still didn’t take off. Now sources are telling Bloomberg Credit Suisse Group AG is helping shop the company around. Essential is a perfect example of how difficult it is to make a hit in the smartphone market, even if you’re the guy that led Google’s Android team.