Just skimmed the web-pages for the parties on how much their fees are. The Liberals charge $10 a year, the Tories charge $15, and the NDP charge $25 (if you’re in Ontario; their fee varies from province to province, so I picked Ontario as the largest province).
Liberals FAQ page has a fair bit of information: http://www.liberal.ca/get-involved/membership-frequently-asked-questions/
Tories and NDP are more bare-bones: