Balloons
Party decorations usually do not stay for long after the event has passed, especially balloons. You usually get rid of balloons after a day or two, so there is no point in spending a lot more than you need. You can head to the dollar store and get twice the amount for half the price.
Band-aids
Disregard the name brands, and you can do yourself a favor by saving up to 50% off pharmacy prices by buying your first aid essentials at the dollar stores. They work just the same as the branded ones and will not cost you an arm and a leg.