How do you know when to buy the rock? When it is sinking like (excuse me) a rock, when it is rising, or when it is neither increasing nor decreasing in value?
Buying for capital gains is always risky (in any market), because as many here would agree, it is a purely speculative bet on the hope that your analysis is right.
So now that there has been a relatively weak uptrend in some property markets, are we buying the $800 rock for $799, or more relevant in my case, selling some $800 rocks for $801 each? I really think that if you wanted to buy a $100 rock in the Australian property market you're probably about 30 years late!