PROBABILITY OF DEMAND CURVES OF HIGH COST GOODS

> We are all familiar with the commonly known demand curve, which goes
down
>with the increasing cost of the good. The question I would like to
pose is
>what happens after that curve touches the zero line. i.e. the behavior
of
>the demand curve when the customer is no longer able to buy the good
with a
>monthly/yearly income. Of course this may no longer be called 'demand'
>technically as the desire to buy the good is not backed with the
required
>buying power. On the other hand it is very obvious that such a study
is
>very meaningful e.g. buying a house, buying an automobile etc. The
lack of
>direct buying power is substituted by the ready availability of loans.
Let
>us take a look at the demand for a high cost quantity from the
consumers'
>point ...