It's always easier to come down, so start as high as you're comfortable!
I always think about our pricing as value based, and I definitely think our online advanced course is worth $250 if you're a few months into React and want to level up.
Consider this: if you make 100k/yr as a developer, that's only 5 hours of pay.
Learning how and when to use those patterns on your own will definitely cost your boss more money than that.