We like to say a 5 dollar Duncan butterfly is all you need. We aren’t kidding and you’ll see many of our presenters using just that. They can be found at most big box stores and big online retailers.
You can easily glue a spare half spec bearing and make any yoyo fixed axle. The boho and legend wing are both solid cheap wood fixed axle yo-yos
If you want to get fancy. Jon gates, Tom Kuhn, wildwoods, and spinworthy make amazing wood and if you can find a TMBR they are great too.
ZGRT has d bearing blanks and the polycarbonate el mijo plays fantastic fixed axis, similarly the kasm from layer infinity comes with bearing locks can play fixed.
Or find a blank in this thread for whatever yoyo you’re looking to play with.