When considering a Flame Angelfish for sale, it's important to check for signs of good health before making a purchase. Look for vibrant coloration, as a healthy Flame Angelfish will have bright orange and red hues. Avoid fish that appear lethargic, have cloudy eyes, or show any visible wounds. Make sure the fish is actively swimming and eating, as these are good indicators of its health. Additionally, ask the seller about the fish’s diet and any treatments it may have undergone to ensure it’s in optimal condition for your tank.