How does an intermediary charge for his service?

In the scenario of a 1031 you use a qualified intermediary for the transaction. 

My attorney is reviewing all contracts, deed, title, and email communication to the broker/intermediary for $1,000 flat fee.

I've bought packages like this, some more complicated (multiple sellers, one buyer (me), financed...) but not with an intermediary.

They can use this money to purchase the new primary.The Key to a successful 1031 is that they need to use the services of qualified intermediary who in an unrelated 3rd party in addition to all of your regular vendors. 

I have a relative wanting me to assist with an exchange, but want to make sure it's done well, so would like to refer the work to a seasoned and qualified intermediary that's willing to share some of the details behind the 1031 curtain.  

@Mindy Jensen The easy way to identify the REAL principal buyers in any given market and not the intermediaries is to define the geographic parameters first (city, county, etc.) and have title company in other data provider pull deeds for entity names in order to create a "Top 100" list.

Also, if your strategy is a 1031 exchange be sure you properly vet the QI (qualified intermediary) you select for the job.

Let me know if you need an intermediary recommendation for the 1031. 

You'd need to transact through an intermediary Portal.In practice most people used Reg.