I don't think you should include a definition of what a VA can offer. I think you should include a definition of what *you* can offer.
Describe for them as specifically as possible (given the short amount of space) what you can do to help them. How will you bring value to their business. Make the letter personalized to the specific attorney who will be receiving your letter. It takes more time to do it this way but you will have more chance for success.
I don't like mass mailings and am in favour of personalized directly targeted mailings. I worked in management for many years and the one thing that bothered me more than anything was receiving a letter from someone who couldn't take the time to find out my name before they sent me something. Remember that you will be sending a letter to a person who happens to be an attorney not an attorney who happens to be a person! Success is in the details.
These are just my opinions and not everyone will agree with me
