If that's the case, the savings are not 'spent' but are simply invested in the house. They should be able to sell the house for the net value (market value minus mortgage outstanding) which should be roughly equal to the down payment.
Also don't forget taxes, insurance, mortgage interest needs to get paid while house is in your hands. Most mortgages have lots of interest during the first few years.
Im not sure about Canada, but Private individuals can list on redfin and Zillow in the US. MLS posting must be from a broker, but you can hire one flat rate upload your listing