Hi, @mandia .
Thank you for reaching out!
The best way to offer a product for pickup only would be to create a shipping profile for that one specific product. This way, you can make this product available for pickup only. I would ensure that you provide that information to your customer through the product description so that they are aware of pickup only. If you need me to go over creating a shipping profile, please let me know, and I would be happy to walk through it with you!
Please let me know if you have any further questions! I would love to learn more about your business. What type of products do you sell?
Talk soon,