There are liars, damned liars, and people who play silly buggers with scales.
I think the best way to fix the graph would be shading or line texture to indicate the scale. The biggest problem is that the inconsistent scale is a surprise you only see upon close reading, after you've visually digested the trend. So the scale needs to be apparent in this first visual digest. (Sort of like how many logarithmic charts include thin axis marker lines in the body of the graph itself, so as to immediately inform a quick glance.)
This graph misrepresents the rate the price declines and the length of time it has been stable for, which throws off nearly all non-trivial conclusions.
B) be careful about telling other people what they think