Hypos (Ghosts) are a recessive morph. If you bred a het hypo to a normal you would get offspring that is 50% het for hypo. You will not get a visual hypo unless you breed two hets or a visual hypo to a het. Also when buying hets its important to trust who you are buying from. Its very easy to falsely represent normal animals as hets, which is why reputation is particularly important when buying a het.