These three tech stocks are off their highs and look like great long-term buys.Warren Buffett once famously said, "Be fearful when others are greedy and greedy when others are fearful." With that in mind, here are three tech stocks investors should consider piling into while others have become fearful.1. AlphabetAlphabet (GOOGL 0.58%) shares have sold off recently on concern about increasing competition in search as well as a court ruling that the company's Google search engine is a monopoly.Although Alphab ...