People who import to resell are not suppliers, they are
distributors. I know we use the term 'suppliers' around here a lot, but the true suppliers are the Chinese companies that make these things. Just wanted to clear that up.
You can't write a letter to customs complaining that your 600-bottle package of
e-liquid got confiscated, and then argue "they are going to force me back to smoking analogs".
e-liquid only has a shelf-life of approx 2 years. Both you and they know this package is not for personal use. You are seeking to be a "distributor" -- although they would prefer the much more FDA-friendly term "drug dealer".
I see a lot of "poor little old me" attitudes going on here for people who aren't in this for strictly personal use. I can understand the anger if you're strictly in the position of somebody improving your health and then the FDA wants to take that option away from you. That anger is justified. But I find myself increasingly having little sympathy for all the "gold rush" types on here. Sure, we need US distributors. But not every user on here can be one. So please don't use the "they're trying to ruin my health" argument if you're looking to open a business rather than just vape.
Most small (for personal use) packages are going to get through easy. They're looking to snag the big packages because they don't want to see someone like you make money at Big Tobacco and Big Pharma's expense.