Limit on amount of vanilla take home to USA?

We brought back 4 500ml bottles.
I've been told aa long as it doesn't appear you are stocking for resale, should be not an issue.
Be sure to declare at your port of entry.
In L.A. the CBP agent said of our vanilla, coffee (8 kilos), and 2 liters of liquor-
"All the usual suspects", and waved us through. We declared $300 US