What is an acceptable profit margin for FBA

In your opinion, what would be the bare minimum and decent profit margin % so that a product is actually profitable?

I’m planning to start with my very first items and want to go very carefully about it.

Starting with just 1 or 2 products of the same type un a not too large qty, which means the wholesale price per unit won’t be as low.

Any advice is very welcome 🙂