Sometimes there just doesn't appear to be a home out there for them. Sometimes they think they should write an offer on something that really doesn't suit their needs.
A great article for those of you that think it's taking just waaay tooo long:
These 5 items noted are good, appropriate and justified.
But, sometimes, the right house just doesn't come along at the right time ~ therein lies the need for patience.
After all, it is a Virtue!