This is always a tough decision.
If you don't put up a For Sale sign, you lose the chance to get the calls from prospective buyers. And interested buyers will drive right by the property.... they might buy something else without ever knowing this one was up for sale.
If you do put up the sign, you can possibly impact the tenant's business. Or you might make the tenant mad which results in him not being cooperative about showings and inspections.
Generally, the value of the sign is too high to not use one. Put it as far from the entrance to the business as possible. The seller can also give an incentive to the tenant; probably a rent-reduction during the sale.
Dec 15, 2011