Hi Helen,
You can always do online research on any property. In some cases it's as much information as a real estate broker has. I'm not familiar with VA Real Estate at all, but in most cases, as a buyer, it doesn't mean you'll get a better deal. Most cases the seller signs a listing agreement saying they'll pay 6% to get it sold and if the buyer uses an agent they get half. If the buyer doesn't use in agent, in most cases, the listing agent keeps it all. If the agent you're using feels bothered by your questions, get a new agent. If you feel bothered asking them questions, don't it's their job and that's what they are paid for. That being said don't go on a property tour across town with your agent on a property you have no intention of buying, that's just common sense. Lastly don't ever try to by through the listing agent or even ask questions. It's their job, and in most cases the law, to do everything with the sellers best interest in mind.
Hope this helps
Good Luck!
Ben