I have a verizon wireless usb modem, but I use 3 or four different laptops so I would like to hook the modem up to a router so I can wirelessly connect each of my laptops as I move and not have to unplug the modem each time.

At the verizon store the sales person said there was some kind of router that allowed this that cost $300 and sold at Best Buy - but didn't know brand - so does such a thing exist (and preferably not so expensive) or could I possible use an apple airport?