I tried Lambert's this year and love it for the price. Sign up at AM Leonard to receive emails, they offer free shipping a few times a year and that's a deal that's hard to beat.
This bale is 65 lbs and will last years depending on how many plants you start. I have 3/4 of the bag left and started and just repotted a few hundred seedlings.
https://www.amleo.com/lambert-germin...8-cf/p/LM18GM/