If you have a whiteboard, you obviously need dry-wipe markers, but there might be some uses you haven't thought of too. A lot of businesses have forms they need to fill in regularly, and don't really need to keep the results. Rather than keep a stack of blank forms, or spend time printing them every time they're needed, why not laminate one form, then fill it in with a fine dry-wipe marker? It can then just be wiped clean for re-use. We've done this ourselves for forms used in our warehouse, and it works well. We used Staedtler Lumocolor markers, which need a damp cloth to wipe off, while a standard dry-wipe marker would wipe off a bit easier.
If you use a whiteboard a lot, refillable markers can be a saving - a few of the markers below have refills available, while the Pilot V Board Master is refilled with simple cartridges.