There are plenty of vendors who will work with you, even if you're new to the business. Some might need persuading, and some might say no. That's fine. Someone

There are plenty of vendors who will work with you, even if you're new to the business. Some might need persuading, and some might say no. That's fine. Someone else will say yes. Once you've found folks who will work with you, earn a reputation for treating their products and livelihoods with care, and treating them like people and not like APIs. Then the deals will follow, and maybe some of the people who said no at first will reconsider It's a hard business (to put it very mildly), and none of this guarantees success, but not treating people like people almost guarantees failure.