Value gets rewarded. Period.
There are homes on the market that are listed by savvy agents who have savvy sellers and they've done their research to put the price at a good value in order to get it sold, not just listed. And whether or not you offer on that home (high or low) it will sell. Why? That's the homework that you should be doing.
On the other side of the spectrum there are timid, or non-professional agents who haven't built the rapport with their clients to price the property within reasonable market values.
When you buy a home for your own residence or for your own investment purposes, you have to have a goal, written down, clear and achievable. Buying a home at market value that meets your goals and needs is far better than offering low and missing out on the opportunities that your goal offers.
Putting in low offers for the sake of putting in low offers is obviously a waste of everyone time especially yours. BUT, putting in low offers because it is consistent with your goals and financial real estate plan is a different story. It may take many offers and rejections to finally get someone to come as low as you'd like and in that time frame many things can happen:
1. Inventory levels decline and prices begin to stabilize and you missed an opportunity because there are now more buyers than available homes.
2. Interest rates increase and lower your purchasing capability.
3. A good deal gets missed that could have made you more than you would have saved.
The list goes on and on, but I think you get the point. First, understand your goals and take the necessary steps to obtain that goal. Since I have no idea what your investment strategy is, I have no way of really giving you any sound advice.
***When I work with a buyer, I offer my knowledge and provide the client with the information that they need to accomplish their goals and make a quality decision. IF a client wants me to offer low, then, we offer low. If we offer low over and over and over and seem to be getting nowhere, we meet and try to redefine the goals or come to terms with the outcomes. But at the end of the day, I have never felt like I have offended a seller because I see my job as the person who helps accommodate your goals and needs, not mine.
I hope this helps, and I hope you get a good deal....whatever that might mean to your portfolio! :D