Hello and welcome elieceralcala,
That's one of the biggest disadvantages of sourcing products from dropshippers, either you have only a slim margin for profit or none at all. Most any sellers will dive at a price just to stay competitive even if that means they may lose on a few of their items.
I think sourcing products from wholesalers would give you a better profit margin. Just remember that wholesalers don't often list their bulk prices on their website. You will need to login or contact the wholesalers to view prices. Wholesalers do this to protect retailers like you. It's so worth spending 5 minutes to sign up with wholesalers (or email then directly) and see how much the items are at different order volumes.
Try that and let me know how it goes. If you need help finding more suppliers, just let me know and I will run a search for you.