The cost of a one-year home warranty varies depending on the type of plan you choose. A basic plan (which typically covers repairs and replacements only) can be as low as $350 per year, while an extended plan (which also covers plumbing and appliances) costs around $600 per year. I also recommend checking reviews of companies here
https://www.pissedconsumer.com/company/afc-home-club/customer-service.html. It will help to avoid low-rated ones. It's easy to get a quote online, so do some research and compare prices before signing any contracts.