I've noticed huge disparities in vendor's pricing-- cakes, DJs, flowers, even photographers and videographers. I've done my homework, and weeded out the definite no's based on website, feedback, reviews, and word-of-mouth. But we're still left with 3-4 vendors (in each area) that are comparable, each with their pros and cons, and some pricier than others. I can't seem to weigh them out evenly. Is negotiating a price acceptable? Has anyone had any success with that? Advice would be appreciated!