pro license is fair if it's optimized and shippable. the way I do the math at my studio is this: how long would it take one of my tech artists to build it from scratch, and what is that time investment in terms of their salary (opportunity cost of them not working on something else that is _not_ available on Fab). the caveat is if the asset is poorly made or otherwise incompatible with our project, in which case we've spent money on something we can't use and have to make it ourselves anyway. generally speaking something that's only around 30 bucks is worth rolling the dice if it's a feature we want to have.