Nursing Bras

Where is everyone getting their maternity bras from? I've always been large chested and small around, pre pregnancy I was a 34G, and I've ALWAYS struggled to find bras that fit without spending outrageous amounts of money on them. I went to Motherhood in the mall and the woman there was being really pushy (they were having buy 3 get 1 free on bras, I don't consider that a sale) and tried to get me to buy 4 $50 bras. I HATE interacting with store employees when buying bras because they're too pushy and they all try to tell me I'm a size that I'm Clearly not.

Where is everyone getting their bras and how many is an adequate number to have?