Here is a really good article by Curtis Seltzer over at the LandThink Blog.
By Curtis Seltzer on September 29, 2009
A simple question — “When should I sell my property?” — has, as you might expect, no single or simple answer. The timing of any sale depends on many factors operating on the seller. The strongest pressures often have nothing to do with the property itself.
Here are several broad principles that usually — but not always — apply in these decisions.