This vacancy is in the little strip mall across the street from Dutch Square, and just north of Palmetto Fine Cleaners.
You can see that the marquee is kept water-tight by reversing a sign for Integrity Tax & Bookkeeping. As far as I can tell, they are still around at 1230 Broad River Road (and in this year's phonebook) after having moved to another Broad River Road location in-between. I'm not sure when they would have been here, but it was probably a good while ago as googling for 1724 turns up Arch Paging instead. I think they have been gone a good while as well though, as in the phonebooks I have available at home, they are listed in the Feb 1997 one, but not the Feb 2007 edition. Of course, it's probably not a coincidence that the pager market essentially disappeared during that interval..