When buying a suction/air pressure vibrator, it's important to choose a toy that is safe, effective, and meets your needs and preferences. Here are some steps to follow when shopping for a suction/air pressure vibrator:

1. Research different brands and models: Look for reputable manufacturers that use body-safe materials and offer quality products. Read reviews and ratings from other customers to get an idea of the effectiveness and quality of the product.
2. Consider your needs and preferences: Think about what you want in a suction/air pressure vibrator, such as power level, size, and features like different vibration patterns or remote control.
3. Check the product specifications: Make sure the toy is made from body-safe materials, has adjustable suction and intensity settings, and meets other criteria that are important to you.
4. Compare prices: Suction/air pressure vibrators can vary in price, so it's important to compare different options to find one that fits your budget.
5. Purchase from a reputable retailer: Only buy sex toys from reputable retailers that prioritize customer privacy and use discreet packaging for shipping. You may also want to look for stores that offer product warranties and customer service in case you have any issues with your purchase.
6. Use the toy safely and according to the manufacturer's instructions: Make sure to clean the toy before and after use, and to use it in a safe and responsible manner. Communicate with your partner and explore your own body to figure out what works best for you.

As with any sex toy, it's important to choose a suction/air pressure vibrator that is made from body-safe materials, and to use it safely and according to the manufacturer's instructions. It's also important to communicate with your partner and explore your own body to figure out what works best for you.