Bargain hunters should love these great stocks.By most metrics, the stock market is priced at a premium these days. But that doesn't mean bargains can't still be found.Three Motley Fool contributors think they've identified dirt-cheap healthcare stocks to buy right now. Here's why they picked CRISPR Therapeutics (CRSP -2.65%), Gilead Sciences (GILD 0.05%), and Pfizer (PFE -0.81%).You can still get in on the ground floorProsper Junior Bakiny (CRISPR Therapeutics): Valuing relatively small biotech companies t ...