Check the agent's registration with the Saskatchewan Real Estate Commission before anything else, then verify their claims the way you'd verify anything else long distance, by calling a couple of named past clients directly rather than relying on online reviews alone.
An out-of-province buyer also needs a Saskatchewan lawyer to close through Information Services Corporation, typically for legal fees of $800 to $1,500, and should budget a home inspection at $400 to $600 given that a walkthrough by video is not a substitute for one in person.
Joel Dyck works with relocating buyers on exactly this kind of remote due diligence, from comparables to closing coordination. Get your hand-reviewed valuation from Joel Dyck.