A lower commission can mean less marketing budget, less negotiating leverage, or an agent chasing volume rather than result, none of which shows up until your home is already listed. What you are really paying for is the outcome: sale price, terms and how smoothly it closes.
Commission is only one piece of what a seller pays at possession; legal fees and adjustments are added on top. Total seller closing costs in Saskatchewan typically run 4 to 6 percent of the sale price, covering all of that together, not commission alone.
A fair question to ask a low-commission agent is what they are cutting to hit that number, not whether the number itself is good or bad in isolation. Get your hand-reviewed valuation from Joel Dyck.