I have found Escrow.com (http://escrow.com/) to be one of the few, if not the only oneline escrow company licensed to provide services across the United States.

Also, when it comes to automobile transactions, they go the extra mile (pun indented), with services that include:

Title Transfer
Inspection Service
Vehicle Title Insurance
Vehicle and Motorcycle Transport
Vehicle History

To quote the biggest online market of them all, eBay:

“Pay safely - beware of fake escrow services when you consider using them to pay for your eBay item.

“For eBay transactions, you should use eBay's only approved Escrow Company: Escrow.com (http://escrow.com/)”

Ulf Wolf