When buying a realistic dildo, there are a few important factors to keep in mind to ensure that you get a quality product that is safe and enjoyable to use.

1. Choose a reputable retailer: Look for a reputable retailer that sells high-quality sex toys. This can help ensure that you get a product that is safe, made from body-safe materials, and free from defects.
2. Check the materials: Make sure to check the materials of the dildo before purchasing. Realistic dildos are typically made from silicone, PVC, or TPE. Make sure the material is body-safe, hypoallergenic, and easy to clean.
3. Read reviews: Look for reviews from other customers who have purchased the product. This can give you a sense of the quality of the dildo, how realistic it is, and how well it performs.
4. Consider features: Realistic dildos may include additional features such as a suction cup base, balls, or vibrations. Consider whether these features are important to you and whether they enhance your experience.
5. Size: Consider the size of the dildo and whether it is appropriate for your level of experience. For beginners, it may be best to start with a smaller size and work your way up.
6. Price: Consider your budget. Realistic dildos can range from relatively inexpensive to very expensive, depending on the materials and features.
7. Clean and store properly: Once you have purchased a realistic dildo, it is important to clean it properly after each use and store it safely and hygienically to prolong its lifespan.

By keeping these factors in mind, you can help ensure that you get a realistic dildo that is safe, enjoyable, and fulfilling to use.