In case you haven't explored this, check to see if your city has a re-sale store for office supplies and equipment. You can yield some HUGE savings. We have a couple here in town. The big part of their business is furniture and equipment. But ours also sells supplies.
Most items are whole (unused, just surplus); others are being recycled like binders or hanging folders. When you start comparing some of the pricier items like 3 ring binders, sheet protectors, reams of colored paper, hanging folders, namebadge holders, etc. there are great savings to be had.
Like any re-sale shop, selection varies day by day.
We always check there first before paying full price at a regular retail store.