I agree with Mkebound. Call a local florist. When you give them your budget amount - make sure you know that delivery and taxes will be additional. I try to say - I have $xx to spend, and that has to include the taxes and delivery fees.
Another thing - ask the florist what flowers are most budget friendly right now. In-season flowers (i.e. ones that they have in the store right now)...will most often give you the biggest bang for your dollar.