A good article on the costs involved in a real estate transaction that many people tend to overlook found in the Globe and Mail on March 14th 2012.
The following is a list of costs to consider when analyzing your real estate budget:
1. Selling costs (realtor fees or marketing fees or combo of both if listing on MLS for self. (Yes, you do still have to pay a realtor their commissions if they bring you a buyer, even if you use the $100 listing services, etc.)
2. Land transfer tax on new purchase
3. Mortgage penalties for early cancellation (if any)