There are a handful of reputable sex toy sellers online. My personal recommendation is LoveHoney. They have the best prices, and the best customer support and returns policy. They also offer free express two day shipping to anywhere in the USA if you spend more than $100.
Another online sex toy store I’d recommend is BestVibe. In particular, they have a great selection of male sex toys, including some of the latest and most innovative products from China and elsewhere.
If you’re looking for interactive masurbators that synch to pre-recorded porn (including VR porn) or even live webcam girls or for remote sex with a lover, then Kiiroo is your place to go. Their groundbreaking male sex toys can be used simply as male masturbators too.