Not sure what you are asking. Because a full time, full service pro would definitely knock over bushes to find what you are looking for.
If you having problems seeking an agent to work with you, give me a call.
Your 2nd question is almost everyone's... the answer, because we can! Not meaning to be crass but the net offers people like yourself an opportunity to search out properties for sale. But knowing where to look is the trick. It's not really a trick or a big a secret. As professional we are dealing with this everyday! That doesn;t mean I'll pick up every lsited property within your criteria... It means the search is far better and more efficient.
Call me I can discuss more details and explain how I can help you. You can look on websites all day but the search, takes a long tasking time. why not let a sales pro handle most of your searching for you...