Sharpe's was in the 1998 phonebook, but was gone by the 2008 one, so I'm just going to put 2000s as the closing date.
Loopnet says the building was built in 1930 and describes it as "in poor condition". I'm not sure if that was before the partial gutting it seems to have undergone by the time I took these photos. If you look very closely in the full-res versions, you can still see some Sharpe's signage in the back of the building.
The three ads above come from the 1998 white pages, the 1998 Yellow Pages "Appliance" section and the 1998 "Furniture, Used" section. It's a little odd that the best one comes from the white pages..