yes i offered 25k below the asking price, and they accepted, unforunately for some people, they have to move regardless of what the market is doing, be it personal circumstances or for health or money reasons.
also depends on your financial situation, if your going to have a very high LTV, then personally its risky just incase something happens and you need to sell in the next 3-4 years, i think prices wont drop too much more personally, maybe another 10% max.
All just my opinion of course.