If anyone lives in a state that has Kroger grocery stores, get your valerian from there. The store has $5 bottles of 100 500mg caps on buy one get one free sale year round. Then that brand always has $1 off coupons attached to the bottles, so 2 bottles (100g) of valerian comes out to $3 - by far the cheapest you can get valerian anywhere. This way it's more affordable to dose up to 10g a day.
The effects are most noticeable when stacked with other mild calming supplements like l theanine, chamomile, etc. But once you've had it in your system daily for awhile, it's noticeable even on its own. It helps my sleep a lot.