Here are a few centerpieces that are budget friendly and creative. I know you have seen or used rock candy on your candy buffet tables. How about using it for a centerpiece as well? It's inexpensive and comes in so many colors to match any decor. The ball is styrofoam with matching jelly beans glued on.
Hang rock candy to mimic chandelier.
If you know me than you know I have a flair for the dramatic. Spray paint branches and poppy seed branches with gold spray paint. Fill vase with red garland and looks like you spent serious cash! For a less Christmas look, fill the vase with anything to match your decor - like shredded tissue paper, fruit, colored rocks from pet supply store, etc..... plus spray paint comes in every color imaginable.