If you've ever bought a house, you've probably dedicated a full shelf somewhere to the documents that were involved in the transaction. These probably include the written offer, the written and signed counteroffer, the little details (like specific repairs) and what exactly was and was not included in the sale. The paperwork can be tiresome.
This is when a good real estate agent can save the day. Often, these offers and counteroffers are limited by a time frame. The agents are armed with fax machines that, in good economies, never stop churning out paper.
The odds of missing something, not initialing a margin or not checking a box, can drop substantially when you're working with someone who knows the paperwork inside and out.